204342243 has 16 divisors (see below), whose sum is σ = 311965440. Its totient is φ = 116546976.

The previous prime is 204342233. The next prime is 204342247. The reversal of 204342243 is 342243402.

It is not a de Polignac number, because 204342243 - 2⁵ = 204342211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204342247) 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 15 ways as a sum of consecutive naturals, for example, 2593 + ... + 20381.

It is an arithmetic number, because the mean of its divisors is an integer number (19497840).

Almost surely, 2^204342243 is an apocalyptic number.

204342243 is a deficient number, since it is larger than the sum of its proper divisors (107623197).

204342243 is a wasteful number, since it uses less digits than its factorization.

204342243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18346.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 204342243 is about 14294.8327377413. The cubic root of 204342243 is about 589.0055478006.

Adding to 204342243 its reverse (342243402), we get a palindrome (546585645).

The spelling of 204342243 in words is "two hundred four million, three hundred forty-two thousand, two hundred forty-three".