31113312013 has 8 divisors (see below), whose sum is σ = 35570644928. Its totient is φ = 26659122624.

The previous prime is 31113312007. The next prime is 31113312049. The reversal of 31113312013 is 31021331113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31113312013 - 2²⁵ = 31079757581 is a prime.

It is a super-2 number, since 2×31113312013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113312313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764631 + ... + 804292.

It is an arithmetic number, because the mean of its divisors is an integer number (4446330616).

Almost surely, 2^31113312013 is an apocalyptic number.

It is an amenable number.

31113312013 is a deficient number, since it is larger than the sum of its proper divisors (4457332915).

31113312013 is a wasteful number, since it uses less digits than its factorization.

31113312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571763.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31113312013 its reverse (31021331113), we get a palindrome (62134643126).

The spelling of 31113312013 in words is "thirty-one billion, one hundred thirteen million, three hundred twelve thousand, thirteen".