31513500012 has 24 divisors (see below), whose sum is σ = 73535422912. Its totient is φ = 10503939600.

The previous prime is 31513499987. The next prime is 31513500037. The reversal of 31513500012 is 21000531513.

It is an interprime number because it is at equal distance from previous prime (31513499987) and next prime (31513500037).

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, 208587 + ... + 326397.

Almost surely, 2^31513500012 is an apocalyptic number.

It is an amenable number.

31513500012 is an abundant number, since it is smaller than the sum of its proper divisors (42021922900).

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

31513500012 is a wasteful number, since it uses less digits than its factorization.

31513500012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140109 (or 140107 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The spelling of 31513500012 in words is "thirty-one billion, five hundred thirteen million, five hundred thousand, twelve".