31013613139 has 2 divisors, whose sum is σ = 31013613140. Its totient is φ = 31013613138.

The previous prime is 31013613119. The next prime is 31013613181. The reversal of 31013613139 is 93131631013.

It is a weak prime.

It is an emirp because it is prime and its reverse (93131631013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31013613139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31013613139.

It is not a weakly prime, because it can be changed into another prime (31013613119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506806569 + 15506806570.

It is an arithmetic number, because the mean of its divisors is an integer number (15506806570).

Almost surely, 2^31013613139 is an apocalyptic number.

31013613139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013613139 is an equidigital number, since it uses as much as digits as its factorization.

31013613139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The spelling of 31013613139 in words is "thirty-one billion, thirteen million, six hundred thirteen thousand, one hundred thirty-nine".