31631097263 has 2 divisors, whose sum is σ = 31631097264. Its totient is φ = 31631097262.

The previous prime is 31631097241. The next prime is 31631097271. The reversal of 31631097263 is 36279013613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31631097263 - 2¹⁴ = 31631080879 is a prime.

It is a super-2 number, since 2×31631097263² (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 31631097263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31631097233) 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, 15815548631 + 15815548632.

It is an arithmetic number, because the mean of its divisors is an integer number (15815548632).

Almost surely, 2^31631097263 is an apocalyptic number.

31631097263 is a deficient number, since it is larger than the sum of its proper divisors (1).

31631097263 is an equidigital number, since it uses as much as digits as its factorization.

31631097263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 41.

The spelling of 31631097263 in words is "thirty-one billion, six hundred thirty-one million, ninety-seven thousand, two hundred sixty-three".