521486320 has 20 divisors (see below), whose sum is σ = 1212455880. Its totient is φ = 208594496.

The previous prime is 521486311. The next prime is 521486321. The reversal of 521486320 is 23684125.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521486321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3259210 + ... + 3259369.

It is an arithmetic number, because the mean of its divisors is an integer number (60622794).

Almost surely, 2^521486320 is an apocalyptic number.

It is an amenable number.

521486320 is an abundant number, since it is smaller than the sum of its proper divisors (690969560).

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

521486320 is a wasteful number, since it uses less digits than its factorization.

521486320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518592 (or 6518586 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 521486320 is about 22836.0749692236. The cubic root of 521486320 is about 804.9105876542.

The spelling of 521486320 in words is "five hundred twenty-one million, four hundred eighty-six thousand, three hundred twenty".