3131231113 has 2 divisors, whose sum is σ = 3131231114. Its totient is φ = 3131231112.

The previous prime is 3131231087. The next prime is 3131231161. The reversal of 3131231113 is 3111321313.

3131231113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3107728009 + 23503104 = 55747^2 + 4848^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131231113 - 2²⁹ = 2594360201 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131231713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565615556 + 1565615557.

It is an arithmetic number, because the mean of its divisors is an integer number (1565615557).

Almost surely, 2^3131231113 is an apocalyptic number.

It is an amenable number.

3131231113 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131231113 is an equidigital number, since it uses as much as digits as its factorization.

3131231113 is an evil number, because the sum of its binary digits is even.

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

The square root of 3131231113 is about 55957.4044519579. The cubic root of 3131231113 is about 1462.9799511573.

Adding to 3131231113 its reverse (3111321313), we get a palindrome (6242552426).

The spelling of 3131231113 in words is "three billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred thirteen".