204123222 has 24 divisors (see below), whose sum is σ = 446649840. Its totient is φ = 67366800.

The previous prime is 204123221. The next prime is 204123253. The reversal of 204123222 is 222321402.

It is a super-2 number, since 2×204123222² = 83332579519322568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204123195 and 204123204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54322 + ... + 57957.

It is an arithmetic number, because the mean of its divisors is an integer number (18610410).

Almost surely, 2^204123222 is an apocalyptic number.

204123222 is an abundant number, since it is smaller than the sum of its proper divisors (242526618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204123222 is a wasteful number, since it uses less digits than its factorization.

204123222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112388 (or 112385 counting only the distinct ones).

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

The square root of 204123222 is about 14287.1698387049. The cubic root of 204123222 is about 588.7950338117.

Adding to 204123222 its reverse (222321402), we get a palindrome (426444624).

It can be divided in two parts, 20412322 and 2, that added together give a square (20412324 = 4518²).

The spelling of 204123222 in words is "two hundred four million, one hundred twenty-three thousand, two hundred twenty-two".