312655231 has 12 divisors (see below), whose sum is σ = 364189872. Its totient is φ = 267630048.

The previous prime is 312655207. The next prime is 312655253. The reversal of 312655231 is 132556213.

It is not a de Polignac number, because 312655231 - 2⁵ = 312655199 is a prime.

It is a super-2 number, since 2×312655231² = 195506586943326722, 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 312655231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312655201) 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, 36451 + ... + 44203.

It is an arithmetic number, because the mean of its divisors is an integer number (30349156).

Almost surely, 2^312655231 is an apocalyptic number.

312655231 is a deficient number, since it is larger than the sum of its proper divisors (51534641).

312655231 is an equidigital number, since it uses as much as digits as its factorization.

312655231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8590 (or 8583 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 312655231 is about 17682.0595802638. The cubic root of 312655231 is about 678.7167486851.

The spelling of 312655231 in words is "three hundred twelve million, six hundred fifty-five thousand, two hundred thirty-one".