521453472 has 24 divisors (see below), whose sum is σ = 1368815616. Its totient is φ = 173817792.

The previous prime is 521453453. The next prime is 521453477. The reversal of 521453472 is 274354125.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) 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 (521453477) 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, 2715808 + ... + 2715999.

It is an arithmetic number, because the mean of its divisors is an integer number (57033984).

Almost surely, 2^521453472 is an apocalyptic number.

It is an amenable number.

521453472 is an abundant number, since it is smaller than the sum of its proper divisors (847362144).

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

521453472 is a wasteful number, since it uses less digits than its factorization.

521453472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431820 (or 5431812 counting only the distinct ones).

The product of its digits is 33600, while the sum is 33.

The square root of 521453472 is about 22835.3557449846. The cubic root of 521453472 is about 804.8936870778.

The spelling of 521453472 in words is "five hundred twenty-one million, four hundred fifty-three thousand, four hundred seventy-two".