31604611319 has 2 divisors, whose sum is σ = 31604611320. Its totient is φ = 31604611318.

The previous prime is 31604611201. The next prime is 31604611391. The reversal of 31604611319 is 91311640613.

Together with next prime (31604611391) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31604611319 is a prime.

It is a super-2 number, since 2×31604611319² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31604611399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15802305659 + 15802305660.

It is an arithmetic number, because the mean of its divisors is an integer number (15802305660).

Almost surely, 2^31604611319 is an apocalyptic number.

31604611319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31604611319 is an equidigital number, since it uses as much as digits as its factorization.

31604611319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 31604611319 in words is "thirty-one billion, six hundred four million, six hundred eleven thousand, three hundred nineteen".