31371311872 has 18 divisors (see below), whose sum is σ = 62620080068. Its totient is φ = 15685655808.

The previous prime is 31371311857. The next prime is 31371311903. The reversal of 31371311872 is 27811317313.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61271838 + ... + 61272349.

Almost surely, 2^31371311872 is an apocalyptic number.

31371311872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31371311872 is a deficient number, since it is larger than the sum of its proper divisors (31248768196).

31371311872 is an equidigital number, since it uses as much as digits as its factorization.

31371311872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122544203 (or 122544189 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The spelling of 31371311872 in words is "thirty-one billion, three hundred seventy-one million, three hundred eleven thousand, eight hundred seventy-two".