521874020 has 24 divisors (see below), whose sum is σ = 1099688184. Its totient is φ = 208034816.

The previous prime is 521874019. The next prime is 521874029. The reversal of 521874020 is 20478125.

It can be written as a sum of positive squares in 4 ways, for example, as 64513024 + 457360996 = 8032^2 + 21386^2 .

It is not an unprimeable number, because it can be changed into a prime (521874029) 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, 38669 + ... + 50388.

It is an arithmetic number, because the mean of its divisors is an integer number (45820341).

Almost surely, 2^521874020 is an apocalyptic number.

It is an amenable number.

521874020 is an abundant number, since it is smaller than the sum of its proper divisors (577814164).

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

521874020 is a wasteful number, since it uses less digits than its factorization.

521874020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89359 (or 89357 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 521874020 is about 22844.5621538256. The cubic root of 521874020 is about 805.1100090132.

The spelling of 521874020 in words is "five hundred twenty-one million, eight hundred seventy-four thousand, twenty".