50 (number)

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

In mathematics

Fifty is the smallest number that can be written as the sum of two squares 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.

Related Topics:
Squares - Harshad number

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

Related Topics:
φ - Nontotient - Noncototient

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