200521220 has 24 divisors (see below), whose sum is σ = 423927000. Its totient is φ = 79668992.

The previous prime is 200521219. The next prime is 200521229. The reversal of 200521220 is 22125002.

It can be written as a sum of positive squares in 4 ways, for example, as 4129024 + 196392196 = 2032^2 + 14014^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200521195 and 200521204.

It is not an unprimeable number, because it can be changed into a prime (200521229) 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, 30665 + ... + 36624.

It is an arithmetic number, because the mean of its divisors is an integer number (17663625).

Almost surely, 2^200521220 is an apocalyptic number.

200521220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200521220 is an abundant number, since it is smaller than the sum of its proper divisors (223405780).

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

200521220 is a wasteful number, since it uses less digits than its factorization.

200521220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67447 (or 67445 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 200521220 is about 14160.5515429308. The cubic root of 200521220 is about 585.3111258063.

Adding to 200521220 its reverse (22125002), we get a palindrome (222646222).

The spelling of 200521220 in words is "two hundred million, five hundred twenty-one thousand, two hundred twenty".