722508631 has 12 divisors (see below), whose sum is σ = 795632760. Its totient is φ = 655618080.

The previous prime is 722508629. The next prime is 722508659. The reversal of 722508631 is 136805227.

It is a happy number.

722508631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 722508631 - 2¹ = 722508629 is a prime.

It is a super-2 number, since 2×722508631² = 1044037443738988322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722508691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26260 + ... + 46201.

It is an arithmetic number, because the mean of its divisors is an integer number (66302730).

Almost surely, 2^722508631 is an apocalyptic number.

722508631 is a deficient number, since it is larger than the sum of its proper divisors (73124129).

722508631 is a wasteful number, since it uses less digits than its factorization.

722508631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72546 (or 72533 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 722508631 is about 26879.5206616487. The cubic root of 722508631 is about 897.3206862900.

The spelling of 722508631 in words is "seven hundred twenty-two million, five hundred eight thousand, six hundred thirty-one".