31612536013 has 4 divisors (see below), whose sum is σ = 31624481440. Its totient is φ = 31600590588.

The previous prime is 31612535989. The next prime is 31612536017. The reversal of 31612536013 is 31063521613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31612536013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31612536017) 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, 5968743 + ... + 5974036.

It is an arithmetic number, because the mean of its divisors is an integer number (7906120360).

Almost surely, 2^31612536013 is an apocalyptic number.

It is an amenable number.

31612536013 is a deficient number, since it is larger than the sum of its proper divisors (11945427).

31612536013 is a wasteful number, since it uses less digits than its factorization.

31612536013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945426.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 31612536013 in words is "thirty-one billion, six hundred twelve million, five hundred thirty-six thousand, thirteen".