521713325 has 48 divisors (see below), whose sum is σ = 757094400. Its totient is φ = 349272000.

The previous prime is 521713279. The next prime is 521713331. The reversal of 521713325 is 523317125.

It is a de Polignac number, because none of the positive numbers 2^k-521713325 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2472470 + ... + 2472680.

It is an arithmetic number, because the mean of its divisors is an integer number (15772800).

Almost surely, 2^521713325 is an apocalyptic number.

It is an amenable number.

521713325 is a deficient number, since it is larger than the sum of its proper divisors (235381075).

521713325 is a wasteful number, since it uses less digits than its factorization.

521713325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 493 counting only the distinct ones).

The product of its digits is 6300, while the sum is 29.

The square root of 521713325 is about 22841.0447440567. The cubic root of 521713325 is about 805.0273642692.

The spelling of 521713325 in words is "five hundred twenty-one million, seven hundred thirteen thousand, three hundred twenty-five".