722811725 has 24 divisors (see below), whose sum is σ = 928294752. Its totient is φ = 557928000.

The previous prime is 722811703. The next prime is 722811751. The reversal of 722811725 is 527118227.

722811725 = 222² + 223² + ... + 1296².

It is not a de Polignac number, because 722811725 - 2²⁰ = 721763149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85175 + ... + 93275.

It is an arithmetic number, because the mean of its divisors is an integer number (38678948).

Almost surely, 2^722811725 is an apocalyptic number.

It is an amenable number.

722811725 is a deficient number, since it is larger than the sum of its proper divisors (205483027).

722811725 is a wasteful number, since it uses less digits than its factorization.

722811725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237 (or 8232 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 722811725 is about 26885.1580802494. The cubic root of 722811725 is about 897.4461447654.

The spelling of 722811725 in words is "seven hundred twenty-two million, eight hundred eleven thousand, seven hundred twenty-five".