31131099983 has 2 divisors, whose sum is σ = 31131099984. Its totient is φ = 31131099982.

The previous prime is 31131099953. The next prime is 31131100019. The reversal of 31131099983 is 38999013113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31131099983 - 2²⁸ = 30862664527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31131099953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565549991 + 15565549992.

It is an arithmetic number, because the mean of its divisors is an integer number (15565549992).

Almost surely, 2^31131099983 is an apocalyptic number.

31131099983 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131099983 is an equidigital number, since it uses as much as digits as its factorization.

31131099983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 31131099983 in words is "thirty-one billion, one hundred thirty-one million, ninety-nine thousand, nine hundred eighty-three".