725554631 has 4 divisors (see below), whose sum is σ = 727420200. Its totient is φ = 723689064.

The previous prime is 725554607. The next prime is 725554637. The reversal of 725554631 is 136455527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725554631 is a prime.

It is a super-2 number, since 2×725554631² = 1052859045131092322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725554637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932201 + ... + 932978.

It is an arithmetic number, because the mean of its divisors is an integer number (181855050).

Almost surely, 2^725554631 is an apocalyptic number.

725554631 is a deficient number, since it is larger than the sum of its proper divisors (1865569).

725554631 is a wasteful number, since it uses less digits than its factorization.

725554631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865568.

The product of its digits is 126000, while the sum is 38.

The square root of 725554631 is about 26936.1213057857. The cubic root of 725554631 is about 898.5799131349.

The spelling of 725554631 in words is "seven hundred twenty-five million, five hundred fifty-four thousand, six hundred thirty-one".