204223220 has 24 divisors (see below), whose sum is σ = 443658600. Its totient is φ = 78872192.

The previous prime is 204223219. The next prime is 204223223. The reversal of 204223220 is 22322402.

It can be written as a sum of positive squares in 4 ways, for example, as 21270544 + 182952676 = 4612^2 + 13526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204223223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175475 + ... + 176634.

It is an arithmetic number, because the mean of its divisors is an integer number (18485775).

Almost surely, 2^204223220 is an apocalyptic number.

204223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204223220 is an abundant number, since it is smaller than the sum of its proper divisors (239435380).

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

204223220 is a wasteful number, since it uses less digits than its factorization.

204223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352147 (or 352145 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 204223220 is about 14290.6689836410. The cubic root of 204223220 is about 588.8911664535.

Adding to 204223220 its reverse (22322402), we get a palindrome (226545622).

The spelling of 204223220 in words is "two hundred four million, two hundred twenty-three thousand, two hundred twenty".