31131132013 has 16 divisors (see below), whose sum is σ = 31575847680. Its totient is φ = 30689713600.

The previous prime is 31131131963. The next prime is 31131132061. The reversal of 31131132013 is 31023113113.

It is a cyclic number.

It is not a de Polignac number, because 31131132013 - 2³³ = 22541197421 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 (31131132083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34172028 + ... + 34172938.

It is an arithmetic number, because the mean of its divisors is an integer number (1973490480).

Almost surely, 2^31131132013 is an apocalyptic number.

It is an amenable number.

31131132013 is a deficient number, since it is larger than the sum of its proper divisors (444715667).

31131132013 is a wasteful number, since it uses less digits than its factorization.

31131132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228.

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

Adding to 31131132013 its reverse (31023113113), we get a palindrome (62154245126).

The spelling of 31131132013 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, thirteen".