31524672081 has 16 divisors (see below), whose sum is σ = 49209245568. Its totient is φ = 17574729600.

The previous prime is 31524672037. The next prime is 31524672097. The reversal of 31524672081 is 18027642513.

It is not a de Polignac number, because 31524672081 - 2²⁶ = 31457563217 is a prime.

It is a super-2 number, since 2×31524672081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31524672281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18306150 + ... + 18307871.

It is an arithmetic number, because the mean of its divisors is an integer number (3075577848).

Almost surely, 2^31524672081 is an apocalyptic number.

It is an amenable number.

31524672081 is a deficient number, since it is larger than the sum of its proper divisors (17684573487).

31524672081 is a wasteful number, since it uses less digits than its factorization.

31524672081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36614072.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 31524672081 in words is "thirty-one billion, five hundred twenty-four million, six hundred seventy-two thousand, eighty-one".