204212231 has 2 divisors, whose sum is σ = 204212232. Its totient is φ = 204212230.

The previous prime is 204212207. The next prime is 204212243. The reversal of 204212231 is 132212402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204212231 - 2¹⁰ = 204211207 is a prime.

It is a super-2 number, since 2×204212231² = 83405270579994722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204212251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102106115 + 102106116.

It is an arithmetic number, because the mean of its divisors is an integer number (102106116).

Almost surely, 2^204212231 is an apocalyptic number.

204212231 is a deficient number, since it is larger than the sum of its proper divisors (1).

204212231 is an equidigital number, since it uses as much as digits as its factorization.

204212231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 204212231 is about 14290.2844968181. The cubic root of 204212231 is about 588.8806037612.

Adding to 204212231 its reverse (132212402), we get a palindrome (336424633).

The spelling of 204212231 in words is "two hundred four million, two hundred twelve thousand, two hundred thirty-one".