31500440505544 has 16 divisors (see below), whose sum is σ = 59077252756620. Its totient is φ = 15746506437120.

The previous prime is 31500440505539. The next prime is 31500440505563. The reversal of 31500440505544 is 44550504400513.

It can be written as a sum of positive squares in 2 ways, for example, as 28461478104900 + 3038962400644 = 5334930^2 + 1743262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31500440505497 and 31500440505506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464190909 + ... + 464258764.

Almost surely, 2^{31500440505544} is an apocalyptic number.

It is an amenable number.

31500440505544 is a deficient number, since it is larger than the sum of its proper divisors (27576812251076).

31500440505544 is a wasteful number, since it uses less digits than its factorization.

31500440505544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928453920 (or 928453916 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 31500440505544 in words is "thirty-one trillion, five hundred billion, four hundred forty million, five hundred five thousand, five hundred forty-four".