31717157392 has 20 divisors (see below), whose sum is σ = 62759483136. Its totient is φ = 15521161760.

The previous prime is 31717157371. The next prime is 31717157399. The reversal of 31717157392 is 29375171713.

It is not an unprimeable number, because it can be changed into a prime (31717157399) by changing a digit.

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, 21087784 + ... + 21089287.

Almost surely, 2^31717157392 is an apocalyptic number.

It is an amenable number.

31717157392 is a deficient number, since it is larger than the sum of its proper divisors (31042325744).

31717157392 is a wasteful number, since it uses less digits than its factorization.

31717157392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42177126 (or 42177120 counting only the distinct ones).

The product of its digits is 277830, while the sum is 46.

The spelling of 31717157392 in words is "thirty-one billion, seven hundred seventeen million, one hundred fifty-seven thousand, three hundred ninety-two".