31971492016 has 20 divisors (see below), whose sum is σ = 62869316632. Its totient is φ = 15747152256.

The previous prime is 31971491999. The next prime is 31971492019. The reversal of 31971492016 is 61029417913.

It is a pancake number, because a pancake can be divided into 31971492016 parts by 252869 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (31971492019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14911005 + ... + 14913148.

Almost surely, 2^31971492016 is an apocalyptic number.

It is an amenable number.

31971492016 is a deficient number, since it is larger than the sum of its proper divisors (30897824616).

31971492016 is a wasteful number, since it uses less digits than its factorization.

31971492016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29824228 (or 29824222 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 31971492016 in words is "thirty-one billion, nine hundred seventy-one million, four hundred ninety-two thousand, sixteen".