315192131 has 2 divisors, whose sum is σ = 315192132. Its totient is φ = 315192130.

The previous prime is 315192127. The next prime is 315192179. The reversal of 315192131 is 131291513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315192131 - 2² = 315192127 is a prime.

It is a super-2 number, since 2×315192131² = 198692158888642322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315192131.

It is not a weakly prime, because it can be changed into another prime (315192181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157596065 + 157596066.

It is an arithmetic number, because the mean of its divisors is an integer number (157596066).

Almost surely, 2^315192131 is an apocalyptic number.

315192131 is a deficient number, since it is larger than the sum of its proper divisors (1).

315192131 is an equidigital number, since it uses as much as digits as its factorization.

315192131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 315192131 is about 17753.6512019359. The cubic root of 315192131 is about 680.5475196721.

The spelling of 315192131 in words is "three hundred fifteen million, one hundred ninety-two thousand, one hundred thirty-one".