315957161 has 8 divisors (see below), whose sum is σ = 342277320. Its totient is φ = 291650736.

The previous prime is 315957157. The next prime is 315957199. The reversal of 315957161 is 161759513.

It can be written as a sum of positive squares in 4 ways, for example, as 71503936 + 244453225 = 8456^2 + 15635^2 .

It is not a de Polignac number, because 315957161 - 2² = 315957157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315957151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69710 + ... + 74103.

It is an arithmetic number, because the mean of its divisors is an integer number (42784665).

Almost surely, 2^315957161 is an apocalyptic number.

It is an amenable number.

315957161 is a deficient number, since it is larger than the sum of its proper divisors (26320159).

315957161 is an equidigital number, since it uses as much as digits as its factorization.

315957161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143852 (or 143826 counting only the distinct ones).

The product of its digits is 28350, while the sum is 38.

The square root of 315957161 is about 17775.1838527763. The cubic root of 315957161 is about 681.0976799875.

The spelling of 315957161 in words is "three hundred fifteen million, nine hundred fifty-seven thousand, one hundred sixty-one".