431136631 has 2 divisors, whose sum is σ = 431136632. Its totient is φ = 431136630.

The previous prime is 431136599. The next prime is 431136653. The reversal of 431136631 is 136631134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431136631 - 2⁵ = 431136599 is a prime.

It is a super-2 number, since 2×431136631² = 371757589180060322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 431136631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431136661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215568315 + 215568316.

It is an arithmetic number, because the mean of its divisors is an integer number (215568316).

Almost surely, 2^431136631 is an apocalyptic number.

431136631 is a deficient number, since it is larger than the sum of its proper divisors (1).

431136631 is an equidigital number, since it uses as much as digits as its factorization.

431136631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 431136631 is about 20763.8298731231. The cubic root of 431136631 is about 755.4486937159.

Adding to 431136631 its reverse (136631134), we get a palindrome (567767765).

The spelling of 431136631 in words is "four hundred thirty-one million, one hundred thirty-six thousand, six hundred thirty-one".