204430211 has 4 divisors (see below), whose sum is σ = 205654512. Its totient is φ = 203205912.

The previous prime is 204430207. The next prime is 204430231. The reversal of 204430211 is 112034402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112034402 = 2 ⋅56017201.

It is a cyclic number.

It is not a de Polignac number, because 204430211 - 2² = 204430207 is a prime.

It is a super-2 number, since 2×204430211² = 83583422339009042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204430211.

It is not an unprimeable number, because it can be changed into a prime (204430231) 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, 611900 + ... + 612233.

It is an arithmetic number, because the mean of its divisors is an integer number (51413628).

Almost surely, 2^204430211 is an apocalyptic number.

204430211 is a deficient number, since it is larger than the sum of its proper divisors (1224301).

204430211 is a wasteful number, since it uses less digits than its factorization.

204430211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224300.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204430211 is about 14297.9093226947. The cubic root of 204430211 is about 589.0900566878.

Adding to 204430211 its reverse (112034402), we get a palindrome (316464613).

The spelling of 204430211 in words is "two hundred four million, four hundred thirty thousand, two hundred eleven".