204224661 has 6 divisors (see below), whose sum is σ = 294991190. Its totient is φ = 136149768.

The previous prime is 204224633. The next prime is 204224663. The reversal of 204224661 is 166422402.

It can be written as a sum of positive squares in only one way, i.e., 190274436 + 13950225 = 13794^2 + 3735^2 .

It is not a de Polignac number, because 204224661 - 2⁷ = 204224533 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 (204224663) 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, 11345806 + ... + 11345823.

Almost surely, 2^204224661 is an apocalyptic number.

It is an amenable number.

204224661 is a deficient number, since it is larger than the sum of its proper divisors (90766529).

204224661 is a wasteful number, since it uses less digits than its factorization.

204224661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22691635 (or 22691632 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 204224661 is about 14290.7194010659. The cubic root of 204224661 is about 588.8925515232.

The spelling of 204224661 in words is "two hundred four million, two hundred twenty-four thousand, six hundred sixty-one".