521881360 has 400 divisors, whose sum is σ = 1750512960. Its totient is φ = 142248960.

The previous prime is 521881357. The next prime is 521881369. The reversal of 521881360 is 63188125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521881369) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 27467431 + ... + 27467449.

Almost surely, 2^521881360 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 521881360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875256480).

521881360 is an abundant number, since it is smaller than the sum of its proper divisors (1228631600).

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

521881360 is a wasteful number, since it uses less digits than its factorization.

521881360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 521881360 is about 22844.7228041839. The cubic root of 521881360 is about 805.1137835383.

The spelling of 521881360 in words is "five hundred twenty-one million, eight hundred eighty-one thousand, three hundred sixty".