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# 50 (number)

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

 Cardinal fifty Ordinal 50th (fiftieth) Factorization $2 \cdot 5^2$ Roman numeral L Binary 110010 Hexadecimal 32 Hebrew נ (Nun)

## 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.

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.

## In other fields

Fifty is also:

03-10-2013 05:06:04