This article discusses the number fifty. For the year 50 AD, see 50. For other uses of 50, see 50 (disambiguation)

50 (fifty) is the natural number following 49 and preceding 51.

Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 1² + 7² = 5² + 5². It is also the sum of three squares, 50 = 3² + 4² + 5². It is a Harshad number.

There is no solution to the equation φ(x) = 50, making 50 a nontotient. Nor is there a solution to the equation x − φ(x) = 50, making 50 a noncototient.

The aliquot sum of 50 is 43 and its aliquot sequence is (50,43,1,0). Fifty is itself the aliquot sum of 40 and 94.

Fifty is:

A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.

Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.

A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).

George Harvey Strait (born May 18, 1952) is an American country music singer, actor, and music producer. Strait is referred to as the "King of Country," and critics call Strait a living legend. He is known for his unique style of western swing music, bar-room ballads, honky-tonk style, and fresh yet traditional Country music. George Strait holds the world record for more number-one hit singles than any other artist in the history of music on any chart or in any genre, having recorded 59 number-one hit singles as of 2012.

Strait rocketed to success after his first single "Unwound" was a hit in 1981. While contributing to the neo-traditional movement of the 1980s, he amassed seven number one albums in the decade with his most popular hits including "Fool Hearted Memory" and "Ocean Front Property". By the 1990s, Strait had influenced a new breed of performers while continuing his own successes, having charted upwards of 20 number-one hits including "Heartland" and "Blue Clear Sky". In the 2000s, Strait was named Artist of the Decade by the Academy of Country Music, was elected into the Country Music Hall of Fame, and won his first Grammy award for his hit album Troubadour. Strait continued his previous successes throughout the decade, producing a more contemporary sound with moderate cross-over hits including "She'll Leave You with a Smile" and "You'll Be There".

Curtis James Jackson III (born July 6, 1975), better known by his stage name 50 Cent, is an American rapper, entrepreneur, investor, record producer, and actor. He rose to fame with the release of his albums Get Rich or Die Tryin' (2003) and The Massacre (2005). His album Get Rich or Die Tryin' has been certified eight times platinum by the RIAA.

Born in the South Jamaica of Queens, New York City, Jackson began drug dealing at the age of twelve during the 1980s crack epidemic. After leaving drug dealing to pursue a rap career, he was shot at and struck by nine bullets during an incident in 2000. After releasing his album Guess Who's Back? in 2002, Jackson was discovered by rapper Eminem and signed to Interscope Records. With the help of Eminem and Dr. Dre, who produced his first major commercial successes, Jackson became one of the world's highest selling rappers. In 2003, he founded the record label G-Unit Records, which signed several successful rappers such as Young Buck, Lloyd Banks, and Tony Yayo.

Lee Hazlewood (July 9, 1929 – August 4, 2007), born Barton Lee Hazlewood was an American country and pop singer, songwriter, and record producer, most widely known for his work with guitarist Duane Eddy during the late 1950s and singer Nancy Sinatra in the 1960s.

Hazlewood had a distinctive baritone voice that added an ominous resonance to his music. Hazlewood's collaborations with Nancy Sinatra as well as his solo output in the late 1960s and early 1970s have been praised as an essential contribution to a sound often described as "Cowboy Psychedelia" or "Saccharine Underground".

The son of an oil man, Hazlewood was born in Mannford, Oklahoma and spent most of his youth living between Oklahoma, Arkansas, Kansas, and Louisiana. He grew up listening to pop and bluegrass music. Hazlewood spent his teenage years in Port Neches, Texas where he was exposed to a rich Gulf Coast music tradition. Hazlewood studied for a medical degree at Southern Methodist University in Dallas, Texas. He served with the United States Army during the Korean War.