31312133239 has 2 divisors, whose sum is σ = 31312133240. Its totient is φ = 31312133238.

The previous prime is 31312133219. The next prime is 31312133249. The reversal of 31312133239 is 93233121313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31312133239 - 2²⁷ = 31177915511 is a prime.

It is a super-2 number, since 2×31312133239² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31312133239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312133219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656066619 + 15656066620.

It is an arithmetic number, because the mean of its divisors is an integer number (15656066620).

Almost surely, 2^31312133239 is an apocalyptic number.

31312133239 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312133239 is an equidigital number, since it uses as much as digits as its factorization.

31312133239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 31.

The spelling of 31312133239 in words is "thirty-one billion, three hundred twelve million, one hundred thirty-three thousand, two hundred thirty-nine".