631056731 has 2 divisors, whose sum is σ = 631056732. Its totient is φ = 631056730.

The previous prime is 631056667. The next prime is 631056757. The reversal of 631056731 is 137650136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631056731 - 2⁶ = 631056667 is a prime.

It is a super-2 number, since 2×631056731² = 796465195480812722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (631056781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315528365 + 315528366.

It is an arithmetic number, because the mean of its divisors is an integer number (315528366).

Almost surely, 2^631056731 is an apocalyptic number.

631056731 is a deficient number, since it is larger than the sum of its proper divisors (1).

631056731 is an equidigital number, since it uses as much as digits as its factorization.

631056731 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 631056731 is about 25120.8425615066. The cubic root of 631056731 is about 857.7409301269.

The spelling of 631056731 in words is "six hundred thirty-one million, fifty-six thousand, seven hundred thirty-one".