521356472 has 96 divisors (see below), whose sum is σ = 1232431200. Its totient is φ = 204938496.

The previous prime is 521356469. The next prime is 521356487. The reversal of 521356472 is 274653125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1340054 + ... + 1340442.

It is an arithmetic number, because the mean of its divisors is an integer number (12837825).

Almost surely, 2^521356472 is an apocalyptic number.

521356472 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521356472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616215600).

521356472 is an abundant number, since it is smaller than the sum of its proper divisors (711074728).

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

521356472 is a wasteful number, since it uses less digits than its factorization.

521356472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 674 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 521356472 is about 22833.2317467327. The cubic root of 521356472 is about 804.8437756070.

The spelling of 521356472 in words is "five hundred twenty-one million, three hundred fifty-six thousand, four hundred seventy-two".