31917602972 has 12 divisors (see below), whose sum is σ = 56909688696. Its totient is φ = 15657691920.

The previous prime is 31917602963. The next prime is 31917602993. The reversal of 31917602972 is 27920671913.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75277154 + ... + 75277577.

It is an arithmetic number, because the mean of its divisors is an integer number (4742474058).

Almost surely, 2^31917602972 is an apocalyptic number.

It is an amenable number.

31917602972 is a deficient number, since it is larger than the sum of its proper divisors (24992085724).

31917602972 is a wasteful number, since it uses less digits than its factorization.

31917602972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150554788 (or 150554786 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 31917602972 in words is "thirty-one billion, nine hundred seventeen million, six hundred two thousand, nine hundred seventy-two".