521344685 has 8 divisors (see below), whose sum is σ = 640163040. Its totient is φ = 407376144.

The previous prime is 521344619. The next prime is 521344699. The reversal of 521344685 is 586443125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521344685 - 2⁸ = 521344429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212215 + ... + 1212644.

It is an arithmetic number, because the mean of its divisors is an integer number (80020380).

Almost surely, 2^521344685 is an apocalyptic number.

It is an amenable number.

521344685 is a deficient number, since it is larger than the sum of its proper divisors (118818355).

521344685 is a wasteful number, since it uses less digits than its factorization.

521344685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424907.

The product of its digits is 115200, while the sum is 38.

The square root of 521344685 is about 22832.9736346364. The cubic root of 521344685 is about 804.8377101696.

The spelling of 521344685 in words is "five hundred twenty-one million, three hundred forty-four thousand, six hundred eighty-five".