315917172 has 30 divisors (see below), whose sum is σ = 825870738. Its totient is φ = 105305616.

The previous prime is 315917149. The next prime is 315917191. The reversal of 315917172 is 271719513.

It can be written as a sum of positive squares in only one way, i.e., 252619236 + 63297936 = 15894^2 + 7956^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 487203 + ... + 487850.

Almost surely, 2^315917172 is an apocalyptic number.

It is an amenable number.

315917172 is an abundant number, since it is smaller than the sum of its proper divisors (509953566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315917172 is a wasteful number, since it uses less digits than its factorization.

315917172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975069 (or 975058 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 315917172 is about 17774.0589624317. The cubic root of 315917172 is about 681.0689444840.

The spelling of 315917172 in words is "three hundred fifteen million, nine hundred seventeen thousand, one hundred seventy-two".