204222213 has 12 divisors (see below), whose sum is σ = 317679180. Its totient is φ = 125675136.

The previous prime is 204222209. The next prime is 204222229. The reversal of 204222213 is 312222402.

204222213 is a `hidden beast` number, since 20 + 422 + 221 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58706244 + 145515969 = 7662^2 + 12063^2 .

It is not a de Polignac number, because 204222213 - 2² = 204222209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204222253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872628 + ... + 872861.

It is an arithmetic number, because the mean of its divisors is an integer number (26473265).

Almost surely, 2^204222213 is an apocalyptic number.

It is an amenable number.

204222213 is a deficient number, since it is larger than the sum of its proper divisors (113456967).

204222213 is a wasteful number, since it uses less digits than its factorization.

204222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745508 (or 1745505 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204222213 is about 14290.6337508174. The cubic root of 204222213 is about 588.8901985349.

Adding to 204222213 its reverse (312222402), we get a palindrome (516444615).

The spelling of 204222213 in words is "two hundred four million, two hundred twenty-two thousand, two hundred thirteen".