521713480 has 128 divisors (see below), whose sum is σ = 1263535200. Its totient is φ = 193536000.

The previous prime is 521713471. The next prime is 521713499. The reversal of 521713480 is 84317125.

It can be written as a sum of positive squares in 16 ways, for example, as 64352484 + 457360996 = 8022^2 + 21386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5165430 + ... + 5165530.

Almost surely, 2^521713480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521713480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (631767600).

521713480 is an abundant number, since it is smaller than the sum of its proper divisors (741821720).

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

521713480 is a wasteful number, since it uses less digits than its factorization.

521713480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 521713480 is about 22841.0481370711. The cubic root of 521713480 is about 805.0274439932.

The spelling of 521713480 in words is "five hundred twenty-one million, seven hundred thirteen thousand, four hundred eighty".