521712480 has 48 divisors (see below), whose sum is σ = 1643395824. Its totient is φ = 139123200.

The previous prime is 521712479. The next prime is 521712497. The reversal of 521712480 is 84217125.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 542971 + ... + 543930.

It is an arithmetic number, because the mean of its divisors is an integer number (34237413).

Almost surely, 2^521712480 is an apocalyptic number.

It is an amenable number.

521712480 is an abundant number, since it is smaller than the sum of its proper divisors (1121683344).

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

521712480 is a wasteful number, since it uses less digits than its factorization.

521712480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086919 (or 1086911 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 521712480 is about 22841.0262466466. The cubic root of 521712480 is about 805.0269296445.

The spelling of 521712480 in words is "five hundred twenty-one million, seven hundred twelve thousand, four hundred eighty".