31004020319 has 2 divisors, whose sum is σ = 31004020320. Its totient is φ = 31004020318.

The previous prime is 31004020301. The next prime is 31004020339. The reversal of 31004020319 is 91302040013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31004020319 - 2²⁸ = 30735584863 is a prime.

It is a super-2 number, since 2×31004020319² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31004020294 and 31004020303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31004020339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15502010159 + 15502010160.

It is an arithmetic number, because the mean of its divisors is an integer number (15502010160).

Almost surely, 2^31004020319 is an apocalyptic number.

31004020319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31004020319 is an equidigital number, since it uses as much as digits as its factorization.

31004020319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 31004020319 in words is "thirty-one billion, four million, twenty thousand, three hundred nineteen".