631044431 has 2 divisors, whose sum is σ = 631044432. Its totient is φ = 631044430.

The previous prime is 631044383. The next prime is 631044439. The reversal of 631044431 is 134440136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631044431 - 2¹⁰ = 631043407 is a prime.

It is a super-2 number, since 2×631044431² = 796434147792227522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631044431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631044439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315522215 + 315522216.

It is an arithmetic number, because the mean of its divisors is an integer number (315522216).

Almost surely, 2^631044431 is an apocalyptic number.

631044431 is a deficient number, since it is larger than the sum of its proper divisors (1).

631044431 is an equidigital number, since it uses as much as digits as its factorization.

631044431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 631044431 is about 25120.5977436844. The cubic root of 631044431 is about 857.7353573146.

Adding to 631044431 its reverse (134440136), we get a palindrome (765484567).

The spelling of 631044431 in words is "six hundred thirty-one million, forty-four thousand, four hundred thirty-one".