31131131963 has 2 divisors, whose sum is σ = 31131131964. Its totient is φ = 31131131962.

The previous prime is 31131131917. The next prime is 31131132061. The reversal of 31131131963 is 36913113113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31131131963 - 2¹⁴ = 31131115579 is a prime.

It is not a weakly prime, because it can be changed into another prime (31131131363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565565981 + 15565565982.

It is an arithmetic number, because the mean of its divisors is an integer number (15565565982).

Almost surely, 2^31131131963 is an apocalyptic number.

31131131963 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131131963 is an equidigital number, since it uses as much as digits as its factorization.

31131131963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 32.

The spelling of 31131131963 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, nine hundred sixty-three".