31513161036613 has 4 divisors (see below), whose sum is σ = 31513191467040. Its totient is φ = 31513130606188.

The previous prime is 31513161036593. The next prime is 31513161036673. The reversal of 31513161036613 is 31663016131513.

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 not a de Polignac number, because 31513161036613 - 2²⁵ = 31513127482181 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 (31513161036673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13605043 + ... + 15751936.

It is an arithmetic number, because the mean of its divisors is an integer number (7878297866760).

Almost surely, 2^{31513161036613} is an apocalyptic number.

It is an amenable number.

31513161036613 is a deficient number, since it is larger than the sum of its proper divisors (30430427).

31513161036613 is a wasteful number, since it uses less digits than its factorization.

31513161036613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30430426.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 31513161036613 in words is "thirty-one trillion, five hundred thirteen billion, one hundred sixty-one million, thirty-six thousand, six hundred thirteen".