31431908049072 has 80 divisors (see below), whose sum is σ = 84966619312128. Its totient is φ = 10000430277120.

The previous prime is 31431908049053. The next prime is 31431908049161. The reversal of 31431908049072 is 27094080913413.

It is a happy number.

It is a super-2 number, since 2×31431908049072² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144573528 + ... + 144790775.

Almost surely, 2^{31431908049072} is an apocalyptic number.

It is an amenable number.

31431908049072 is an abundant number, since it is smaller than the sum of its proper divisors (53534711263056).

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

31431908049072 is a wasteful number, since it uses less digits than its factorization.

31431908049072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289364418 (or 289364412 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 31431908049072 in words is "thirty-one trillion, four hundred thirty-one billion, nine hundred eight million, forty-nine thousand, seventy-two".