264357631 has 2 divisors, whose sum is σ = 264357632. Its totient is φ = 264357630.

The previous prime is 264357629. The next prime is 264357641. The reversal of 264357631 is 136753462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264357631 - 2¹ = 264357629 is a prime.

It is a super-2 number, since 2×264357631² = 139769914135864322, which contains 22 as substring.

Together with 264357629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264357641) 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, 132178815 + 132178816.

It is an arithmetic number, because the mean of its divisors is an integer number (132178816).

Almost surely, 2^264357631 is an apocalyptic number.

264357631 is a deficient number, since it is larger than the sum of its proper divisors (1).

264357631 is an equidigital number, since it uses as much as digits as its factorization.

264357631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 264357631 is about 16259.0784179178. The cubic root of 264357631 is about 641.7964104727.

The spelling of 264357631 in words is "two hundred sixty-four million, three hundred fifty-seven thousand, six hundred thirty-one".