31613031613 has 12 divisors (see below), whose sum is σ = 32034376084. Its totient is φ = 31196880000.

The previous prime is 31613031599. The next prime is 31613031623.

31613031613 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 6 ways, for example, as 7951823929 + 23661207684 = 89173^2 + 153822^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31613031613 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31613031623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3187963 + ... + 3197863.

Almost surely, 2^31613031613 is an apocalyptic number.

It is an amenable number.

31613031613 is a deficient number, since it is larger than the sum of its proper divisors (421344471).

31613031613 is an equidigital number, since it uses as much as digits as its factorization.

31613031613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10416 (or 10315 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

It can be divided in two parts, 316130 and 31613, that added together give a palindrome (347743).

The spelling of 31613031613 in words is "thirty-one billion, six hundred thirteen million, thirty-one thousand, six hundred thirteen".