204032221 has 8 divisors (see below), whose sum is σ = 207261144. Its totient is φ = 200827200.

The previous prime is 204032189. The next prime is 204032239. The reversal of 204032221 is 122230402.

It can be written as a sum of positive squares in 4 ways, for example, as 165765625 + 38266596 = 12875^2 + 6186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204032221 - 2⁵ = 204032189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204032195 and 204032204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204036221) 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, 11635 + ... + 23311.

It is an arithmetic number, because the mean of its divisors is an integer number (25907643).

Almost surely, 2^204032221 is an apocalyptic number.

It is an amenable number.

204032221 is a deficient number, since it is larger than the sum of its proper divisors (3228923).

204032221 is a wasteful number, since it uses less digits than its factorization.

204032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11951.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 204032221 is about 14283.9847731647. The cubic root of 204032221 is about 588.7075231066.

Adding to 204032221 its reverse (122230402), we get a palindrome (326262623).

The spelling of 204032221 in words is "two hundred four million, thirty-two thousand, two hundred twenty-one".