315120231 has 12 divisors (see below), whose sum is σ = 467476152. Its totient is φ = 204402096.

The previous prime is 315120227. The next prime is 315120233. The reversal of 315120231 is 132021513.

315120231 is a `hidden beast` number, since 315 + 120 + 231 = 666.

It is not a de Polignac number, because 315120231 - 2² = 315120227 is a prime.

It is a super-2 number, since 2×315120231² = 198601519970986722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315120233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472821 + ... + 473486.

It is an arithmetic number, because the mean of its divisors is an integer number (38956346).

Almost surely, 2^315120231 is an apocalyptic number.

315120231 is a deficient number, since it is larger than the sum of its proper divisors (152355921).

315120231 is a wasteful number, since it uses less digits than its factorization.

315120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946350 (or 946347 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 315120231 is about 17751.6261508629. The cubic root of 315120231 is about 680.4957680758.

Adding to 315120231 its reverse (132021513), we get a palindrome (447141744).

The spelling of 315120231 in words is "three hundred fifteen million, one hundred twenty thousand, two hundred thirty-one".