31817812344 has 32 divisors (see below), whose sum is σ = 79621152000. Its totient is φ = 10595721312.

The previous prime is 31817812321. The next prime is 31817812363. The reversal of 31817812344 is 44321871813.

It is a junction number, because it is equal to n+sod(n) for n = 31817812296 and 31817812305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613054 + ... + 662925.

It is an arithmetic number, because the mean of its divisors is an integer number (2488161000).

Almost surely, 2^31817812344 is an apocalyptic number.

It is an amenable number.

31817812344 is an abundant number, since it is smaller than the sum of its proper divisors (47803339656).

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

31817812344 is a wasteful number, since it uses less digits than its factorization.

31817812344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277027 (or 1277023 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The spelling of 31817812344 in words is "thirty-one billion, eight hundred seventeen million, eight hundred twelve thousand, three hundred forty-four".