31113431113 has 2 divisors, whose sum is σ = 31113431114. Its totient is φ = 31113431112.

The previous prime is 31113431099. The next prime is 31113431117.

31113431113 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25981571344 + 5131859769 = 161188^2 + 71637^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 31113431113 - 2⁵ = 31113431081 is a prime.

It is not a weakly prime, because it can be changed into another prime (31113431117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556715556 + 15556715557.

It is an arithmetic number, because the mean of its divisors is an integer number (15556715557).

Almost surely, 2^31113431113 is an apocalyptic number.

It is an amenable number.

31113431113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113431113 is an equidigital number, since it uses as much as digits as its factorization.

31113431113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The spelling of 31113431113 in words is "thirty-one billion, one hundred thirteen million, four hundred thirty-one thousand, one hundred thirteen".