521314320 has 80 divisors (see below), whose sum is σ = 1686356352. Its totient is φ = 132971520.

The previous prime is 521314319. The next prime is 521314331. The reversal of 521314320 is 23413125.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41701 + ... + 52740.

Almost surely, 2^521314320 is an apocalyptic number.

It is an amenable number.

521314320 is an abundant number, since it is smaller than the sum of its proper divisors (1165042032).

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

521314320 is a wasteful number, since it uses less digits than its factorization.

521314320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94480 (or 94474 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 521314320 is about 22832.3086874718. The cubic root of 521314320 is about 804.8220843132.

Adding to 521314320 its reverse (23413125), we get a palindrome (544727445).

The spelling of 521314320 in words is "five hundred twenty-one million, three hundred fourteen thousand, three hundred twenty".