522663725 has 18 divisors (see below), whose sum is σ = 688478814. Its totient is φ = 393529600.

The previous prime is 522663719. The next prime is 522663733. The reversal of 522663725 is 527366225.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 175561 + 522488164 = 419^2 + 22858^2 .

It is not a de Polignac number, because 522663725 - 2⁴ = 522663709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28946 + ... + 43395.

It is an arithmetic number, because the mean of its divisors is an integer number (38248823).

Almost surely, 2^522663725 is an apocalyptic number.

It is an amenable number.

522663725 is a deficient number, since it is larger than the sum of its proper divisors (165815089).

522663725 is a wasteful number, since it uses less digits than its factorization.

522663725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72385 (or 72363 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 522663725 is about 22861.8399303293. The cubic root of 522663725 is about 805.5159045265.

The spelling of 522663725 in words is "five hundred twenty-two million, six hundred sixty-three thousand, seven hundred twenty-five".