31465720157000 has 128 divisors (see below), whose sum is σ = 76880608272000. Its totient is φ = 12038704249600.

The previous prime is 31465720156993. The next prime is 31465720157083. The reversal of 31465720157000 is 75102756413.

It is a super-2 number, since 2×31465720157000² (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 31 ways as a sum of consecutive naturals, for example, 1967210 + ... + 8173209.

It is an arithmetic number, because the mean of its divisors is an integer number (600629752125).

Almost surely, 2^{31465720157000} is an apocalyptic number.

It is an amenable number.

31465720157000 is an abundant number, since it is smaller than the sum of its proper divisors (45414888115000).

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

31465720157000 is a wasteful number, since it uses less digits than its factorization.

31465720157000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140576 (or 10140562 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 31465720157000 in words is "thirty-one trillion, four hundred sixty-five billion, seven hundred twenty million, one hundred fifty-seven thousand".