521597472 has 48 divisors (see below), whose sum is σ = 1493668512. Its totient is φ = 158059520.

The previous prime is 521597471. The next prime is 521597533. The reversal of 521597472 is 274795125.

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

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (521597471) 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, 245913 + ... + 248024.

It is an arithmetic number, because the mean of its divisors is an integer number (31118094).

Almost surely, 2^521597472 is an apocalyptic number.

It is an amenable number.

521597472 is an abundant number, since it is smaller than the sum of its proper divisors (972071040).

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

521597472 is a wasteful number, since it uses less digits than its factorization.

521597472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493961 (or 493953 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 521597472 is about 22838.5085327392. The cubic root of 521597472 is about 804.9677710436.

The spelling of 521597472 in words is "five hundred twenty-one million, five hundred ninety-seven thousand, four hundred seventy-two".