512312931 has 20 divisors (see below), whose sum is σ = 824178432. Its totient is φ = 315268848.

The previous prime is 512312923. The next prime is 512312947. The reversal of 512312931 is 139213215.

It is not a de Polignac number, because 512312931 - 2³ = 512312923 is a prime.

It is a super-2 number, since 2×512312931² = 524929078539621522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 512312895 and 512312904.

It is not an unprimeable number, because it can be changed into a prime (512412931) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 242211 + ... + 244316.

Almost surely, 2^512312931 is an apocalyptic number.

512312931 is a deficient number, since it is larger than the sum of its proper divisors (311865501).

512312931 is a wasteful number, since it uses less digits than its factorization.

512312931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486552 (or 486543 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 512312931 is about 22634.3308052171. The cubic root of 512312931 is about 800.1629517020.

The spelling of 512312931 in words is "five hundred twelve million, three hundred twelve thousand, nine hundred thirty-one".