31989515048 has 32 divisors (see below), whose sum is σ = 60822964800. Its totient is φ = 15771393408.

The previous prime is 31989515039. The next prime is 31989515069. The reversal of 31989515048 is 84051598913.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 108683 + ... + 275301.

It is an arithmetic number, because the mean of its divisors is an integer number (1900717650).

Almost surely, 2^31989515048 is an apocalyptic number.

It is an amenable number.

31989515048 is a deficient number, since it is larger than the sum of its proper divisors (28833449752).

31989515048 is a wasteful number, since it uses less digits than its factorization.

31989515048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166961 (or 166957 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 31989515048 in words is "thirty-one billion, nine hundred eighty-nine million, five hundred fifteen thousand, forty-eight".