31131476612440 has 32 divisors (see below), whose sum is σ = 70049975744160. Its totient is φ = 12451852268800.

The previous prime is 31131476612419. The next prime is 31131476612441. The reversal of 31131476612440 is 4421667413113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131476612441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22390981 + ... + 23740660.

It is an arithmetic number, because the mean of its divisors is an integer number (2189061742005).

Almost surely, 2^{31131476612440} is an apocalyptic number.

It is an amenable number.

31131476612440 is an abundant number, since it is smaller than the sum of its proper divisors (38918499131720).

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

31131476612440 is a wasteful number, since it uses less digits than its factorization.

31131476612440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46148523 (or 46148519 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 31131476612440 in words is "thirty-one trillion, one hundred thirty-one billion, four hundred seventy-six million, six hundred twelve thousand, four hundred forty".