631075631 has 2 divisors, whose sum is σ = 631075632. Its totient is φ = 631075630.

The previous prime is 631075609. The next prime is 631075639. The reversal of 631075631 is 136570136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631075631 - 2²² = 626881327 is a prime.

It is a super-2 number, since 2×631075631² = 796512904084096322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631075639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315537815 + 315537816.

It is an arithmetic number, because the mean of its divisors is an integer number (315537816).

Almost surely, 2^631075631 is an apocalyptic number.

631075631 is a deficient number, since it is larger than the sum of its proper divisors (1).

631075631 is an equidigital number, since it uses as much as digits as its factorization.

631075631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 631075631 is about 25121.2187403398. The cubic root of 631075631 is about 857.7494930874.

The spelling of 631075631 in words is "six hundred thirty-one million, seventy-five thousand, six hundred thirty-one".