31864272013 has 32 divisors (see below), whose sum is σ = 38923315200. Its totient is φ = 25496133696.

The previous prime is 31864272007. The next prime is 31864272043. The reversal of 31864272013 is 31027246813.

It is a happy number.

It is not a de Polignac number, because 31864272013 - 2²⁹ = 31327401101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31864272043) 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 31 ways as a sum of consecutive naturals, for example, 1308295 + ... + 1332427.

It is an arithmetic number, because the mean of its divisors is an integer number (1216353600).

Almost surely, 2^31864272013 is an apocalyptic number.

It is an amenable number.

31864272013 is a deficient number, since it is larger than the sum of its proper divisors (7059043187).

31864272013 is a wasteful number, since it uses less digits than its factorization.

31864272013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24361.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 31864272013 in words is "thirty-one billion, eight hundred sixty-four million, two hundred seventy-two thousand, thirteen".