31113013147 has 2 divisors, whose sum is σ = 31113013148. Its totient is φ = 31113013146.

The previous prime is 31113013093. The next prime is 31113013189. The reversal of 31113013147 is 74131031113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31113013147 is a prime.

It is not a weakly prime, because it can be changed into another prime (31113010147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556506573 + 15556506574.

It is an arithmetic number, because the mean of its divisors is an integer number (15556506574).

Almost surely, 2^31113013147 is an apocalyptic number.

31113013147 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113013147 is an equidigital number, since it uses as much as digits as its factorization.

31113013147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 31113013147 in words is "thirty-one billion, one hundred thirteen million, thirteen thousand, one hundred forty-seven".