31131309983 has 2 divisors, whose sum is σ = 31131309984. Its totient is φ = 31131309982.

The previous prime is 31131309941. The next prime is 31131309997. The reversal of 31131309983 is 38990313113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31131309983 - 2¹⁸ = 31131047839 is a prime.

It is a super-2 number, since 2×31131309983² (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 31131309983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31131309683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565654991 + 15565654992.

It is an arithmetic number, because the mean of its divisors is an integer number (15565654992).

Almost surely, 2^31131309983 is an apocalyptic number.

31131309983 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131309983 is an equidigital number, since it uses as much as digits as its factorization.

31131309983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 31131309983 in words is "thirty-one billion, one hundred thirty-one million, three hundred nine thousand, nine hundred eighty-three".