204500221 has 8 divisors (see below), whose sum is σ = 210371040. Its totient is φ = 198647568.

The previous prime is 204500213. The next prime is 204500237. The reversal of 204500221 is 122005402.

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 204500221 - 2³ = 204500213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204500195 and 204500204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204500321) 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, 20190 + ... + 28576.

It is an arithmetic number, because the mean of its divisors is an integer number (26296380).

Almost surely, 2^204500221 is an apocalyptic number.

It is an amenable number.

204500221 is a deficient number, since it is larger than the sum of its proper divisors (5870819).

204500221 is an equidigital number, since it uses as much as digits as its factorization.

204500221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 204500221 is about 14300.3573731568. The cubic root of 204500221 is about 589.1572964034.

Adding to 204500221 its reverse (122005402), we get a palindrome (326505623).

The spelling of 204500221 in words is "two hundred four million, five hundred thousand, two hundred twenty-one".