521680902 has 16 divisors (see below), whose sum is σ = 1067626560. Its totient is φ = 169849512.

The previous prime is 521680897. The next prime is 521680909. The reversal of 521680902 is 209086125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521680909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010752 + ... + 1011267.

It is an arithmetic number, because the mean of its divisors is an integer number (66726660).

Almost surely, 2^521680902 is an apocalyptic number.

521680902 is an abundant number, since it is smaller than the sum of its proper divisors (545945658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521680902 is a wasteful number, since it uses less digits than its factorization.

521680902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022067.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 521680902 is about 22840.3349800304. The cubic root of 521680902 is about 805.0106872030.

The spelling of 521680902 in words is "five hundred twenty-one million, six hundred eighty thousand, nine hundred two".