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odd, prime · 157th positive integer

The number 157

157 is an odd prime number. It is the 157th positive integer.

Quick reference

Prime factorization157 (prime)
Divisors1, 157
Binary10011101
Hexadecimal0x9D
Roman numeralCLVII
Digit sum13
Propertiesodd, prime

Frequently asked

Is 157 a prime number?

Yes. 157 is prime — its only divisors are 1 and itself.

What are the factors of 157?

The factors (divisors) of 157 are 1, 157.

What is 157 in binary?

157 in binary is 10011101. In hexadecimal it's 9D.

What is 157 as a Roman numeral?

157 in Roman numerals is CLVII.

What's the digit sum of 157?

Adding the digits of 157: 1 + 5 + 7 = 13.

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