204422221 has 4 divisors (see below), whose sum is σ = 205914492. Its totient is φ = 202929952.

The previous prime is 204422203. The next prime is 204422233. The reversal of 204422221 is 122224402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100280196 + 104142025 = 10014^2 + 10205^2 .

It is a cyclic number.

It is not a de Polignac number, because 204422221 - 2¹⁷ = 204291149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204422201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745930 + ... + 746203.

It is an arithmetic number, because the mean of its divisors is an integer number (51478623).

Almost surely, 2^204422221 is an apocalyptic number.

It is an amenable number.

204422221 is a deficient number, since it is larger than the sum of its proper divisors (1492271).

204422221 is a wasteful number, since it uses less digits than its factorization.

204422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492270.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 204422221 is about 14297.6299084848. The cubic root of 204422221 is about 589.0823818748.

Adding to 204422221 its reverse (122224402), we get a palindrome (326646623).

The spelling of 204422221 in words is "two hundred four million, four hundred twenty-two thousand, two hundred twenty-one".