31357310856 has 32 divisors (see below), whose sum is σ = 80512016640. Its totient is φ = 10169938368.

The previous prime is 31357310837. The next prime is 31357310879. The reversal of 31357310856 is 65801375313.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17655256 + ... + 17657031.

It is an arithmetic number, because the mean of its divisors is an integer number (2516000520).

Almost surely, 2^31357310856 is an apocalyptic number.

It is an amenable number.

31357310856 is an abundant number, since it is smaller than the sum of its proper divisors (49154705784).

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

31357310856 is a wasteful number, since it uses less digits than its factorization.

31357310856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35312333 (or 35312329 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 31357310856 in words is "thirty-one billion, three hundred fifty-seven million, three hundred ten thousand, eight hundred fifty-six".