204223231 has 4 divisors (see below), whose sum is σ = 204333912. Its totient is φ = 204112552.

The previous prime is 204223223. The next prime is 204223237. The reversal of 204223231 is 132322402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204223231 - 2³ = 204223223 is a prime.

It is a super-2 number, since 2×204223231² = 83414256160158722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204223199 and 204223208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204223237) 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, 52525 + ... + 56278.

It is an arithmetic number, because the mean of its divisors is an integer number (51083478).

Almost surely, 2^204223231 is an apocalyptic number.

204223231 is a deficient number, since it is larger than the sum of its proper divisors (110681).

204223231 is a wasteful number, since it uses less digits than its factorization.

204223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110680.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 204223231 is about 14290.6693685076. The cubic root of 204223231 is about 588.8911770266.

Adding to 204223231 its reverse (132322402), we get a palindrome (336545633).

It can be divided in two parts, 20422 and 3231, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 204223231 in words is "two hundred four million, two hundred twenty-three thousand, two hundred thirty-one".