204230321 has 4 divisors (see below), whose sum is σ = 204543732. Its totient is φ = 203916912.

The previous prime is 204230291. The next prime is 204230339. The reversal of 204230321 is 123032402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123032402 = 2 ⋅61516201.

It can be written as a sum of positive squares in 2 ways, for example, as 108972721 + 95257600 = 10439^2 + 9760^2 .

It is a cyclic number.

It is not a de Polignac number, because 204230321 - 2¹⁰ = 204229297 is a prime.

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 204230321.

It is not an unprimeable number, because it can be changed into a prime (204230021) 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 3 ways as a sum of consecutive naturals, for example, 155726 + ... + 157031.

It is an arithmetic number, because the mean of its divisors is an integer number (51135933).

Almost surely, 2^204230321 is an apocalyptic number.

It is an amenable number.

204230321 is a deficient number, since it is larger than the sum of its proper divisors (313411).

204230321 is an equidigital number, since it uses as much as digits as its factorization.

204230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313410.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 204230321 is about 14290.9174303122. The cubic root of 204230321 is about 588.8979917755.

Adding to 204230321 its reverse (123032402), we get a palindrome (327262723).

The spelling of 204230321 in words is "two hundred four million, two hundred thirty thousand, three hundred twenty-one".