315991507 has 16 divisors (see below), whose sum is σ = 350426272. Its totient is φ = 283046400.

The previous prime is 315991493. The next prime is 315991513. The reversal of 315991507 is 705199513.

It is not a de Polignac number, because 315991507 - 2¹⁵ = 315958739 is a prime.

It is a super-2 number, since 2×315991507² = 199701264992262098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315991507.

It is not an unprimeable number, because it can be changed into a prime (315991567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262507 + ... + 263707.

It is an arithmetic number, because the mean of its divisors is an integer number (21901642).

Almost surely, 2^315991507 is an apocalyptic number.

315991507 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

315991507 is a deficient number, since it is larger than the sum of its proper divisors (34434765).

315991507 is a wasteful number, since it uses less digits than its factorization.

315991507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798.

The product of its (nonzero) digits is 42525, while the sum is 40.

The square root of 315991507 is about 17776.1499487375. The cubic root of 315991507 is about 681.1223585792.

The spelling of 315991507 in words is "three hundred fifteen million, nine hundred ninety-one thousand, five hundred seven".