204025221 has 6 divisors (see below), whose sum is σ = 294703110. Its totient is φ = 136016808.

The previous prime is 204025193. The next prime is 204025247. The reversal of 204025221 is 122520402.

It can be written as a sum of positive squares in only one way, i.e., 200081025 + 3944196 = 14145^2 + 1986^2 .

It is not a de Polignac number, because 204025221 - 2⁵ = 204025189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204025194 and 204025203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204025271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11334726 + ... + 11334743.

It is an arithmetic number, because the mean of its divisors is an integer number (49117185).

Almost surely, 2^204025221 is an apocalyptic number.

It is an amenable number.

204025221 is a deficient number, since it is larger than the sum of its proper divisors (90677889).

204025221 is a wasteful number, since it uses less digits than its factorization.

204025221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22669475 (or 22669472 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 204025221 is about 14283.7397413983. The cubic root of 204025221 is about 588.7007905102.

Adding to 204025221 its reverse (122520402), we get a palindrome (326545623).

It can be divided in two parts, 2040 and 25221, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 204025221 in words is "two hundred four million, twenty-five thousand, two hundred twenty-one".