312531562812 has 48 divisors (see below), whose sum is σ = 834243710720. Its totient is φ = 89206209792.

The previous prime is 312531562807. The next prime is 312531562817. The reversal of 312531562812 is 218265135213.

It is an interprime number because it is at equal distance from previous prime (312531562807) and next prime (312531562817).

It is a super-2 number, since 2×312531562812² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312531562817) 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, 1758958 + ... + 1928469.

Almost surely, 2^312531562812 is an apocalyptic number.

It is an amenable number.

312531562812 is an abundant number, since it is smaller than the sum of its proper divisors (521712147908).

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

312531562812 is a wasteful number, since it uses less digits than its factorization.

312531562812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688450 (or 3688448 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The spelling of 312531562812 in words is "three hundred twelve billion, five hundred thirty-one million, five hundred sixty-two thousand, eight hundred twelve".