31310013019 has 2 divisors, whose sum is σ = 31310013020. Its totient is φ = 31310013018.

The previous prime is 31310013001. The next prime is 31310013043. The reversal of 31310013019 is 91031001313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31310013019 - 2¹¹ = 31310010971 is a prime.

It is a super-2 number, since 2×31310013019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31310013419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655006509 + 15655006510.

It is an arithmetic number, because the mean of its divisors is an integer number (15655006510).

Almost surely, 2^31310013019 is an apocalyptic number.

31310013019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310013019 is an equidigital number, since it uses as much as digits as its factorization.

31310013019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 22.

The spelling of 31310013019 in words is "thirty-one billion, three hundred ten million, thirteen thousand, nineteen".