204425221 has 64 divisors (see below), whose sum is σ = 298722816. Its totient is φ = 134553600.

The previous prime is 204425209. The next prime is 204425227. The reversal of 204425221 is 122524402.

It is a cyclic number.

It is not a de Polignac number, because 204425221 - 2⁵ = 204425189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204425192 and 204425201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204425227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 697551 + ... + 697843.

It is an arithmetic number, because the mean of its divisors is an integer number (4667544).

Almost surely, 2^204425221 is an apocalyptic number.

It is an amenable number.

204425221 is a deficient number, since it is larger than the sum of its proper divisors (94297595).

204425221 is a wasteful number, since it uses less digits than its factorization.

204425221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 204425221 is about 14297.7348205931. The cubic root of 204425221 is about 589.0852635552.

Adding to 204425221 its reverse (122524402), we get a palindrome (326949623).

The spelling of 204425221 in words is "two hundred four million, four hundred twenty-five thousand, two hundred twenty-one".