512123136831 has 12 divisors (see below), whose sum is σ = 739747691800. Its totient is φ = 341408837520.

The previous prime is 512123136827. The next prime is 512123136839. The reversal of 512123136831 is 138631321215.

512123136831 is a `hidden beast` number, since 51 + 212 + 3 + 1 + 368 + 31 = 666.

It is not a de Polignac number, because 512123136831 - 2² = 512123136827 is a prime.

It is a super-2 number, since 2×512123136831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512123136839) 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, 30781 + ... + 1012518.

Almost surely, 2^512123136831 is an apocalyptic number.

512123136831 is a deficient number, since it is larger than the sum of its proper divisors (227624554969).

512123136831 is a wasteful number, since it uses less digits than its factorization.

512123136831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097846 (or 1097843 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 512123136831 in words is "five hundred twelve billion, one hundred twenty-three million, one hundred thirty-six thousand, eight hundred thirty-one".