31032313131931 has 2 divisors, whose sum is σ = 31032313131932. Its totient is φ = 31032313131930.

The previous prime is 31032313131857. The next prime is 31032313131943. The reversal of 31032313131931 is 13913131323013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31032313131931 - 2⁷ = 31032313131803 is a prime.

It is a super-2 number, since 2×31032313131931² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31032313134931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516156565965 + 15516156565966.

It is an arithmetic number, because the mean of its divisors is an integer number (15516156565966).

Almost surely, 2^{31032313131931} is an apocalyptic number.

31032313131931 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032313131931 is an equidigital number, since it uses as much as digits as its factorization.

31032313131931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

Adding to 31032313131931 its reverse (13913131323013), we get a palindrome (44945444454944).

The spelling of 31032313131931 in words is "thirty-one trillion, thirty-two billion, three hundred thirteen million, one hundred thirty-one thousand, nine hundred thirty-one".