204243311 has 8 divisors (see below), whose sum is σ = 209653248. Its totient is φ = 198900000.

The previous prime is 204243307. The next prime is 204243313. The reversal of 204243311 is 113342402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204243311 - 2² = 204243307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243313) 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 7 ways as a sum of consecutive naturals, for example, 10415 + ... + 22736.

It is an arithmetic number, because the mean of its divisors is an integer number (26206656).

Almost surely, 2^204243311 is an apocalyptic number.

204243311 is a deficient number, since it is larger than the sum of its proper divisors (5409937).

204243311 is a wasteful number, since it uses less digits than its factorization.

204243311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 204243311 is about 14291.3719075532. The cubic root of 204243311 is about 588.9104770628.

Adding to 204243311 its reverse (113342402), we get a palindrome (317585713).

Subtracting from 204243311 its reverse (113342402), we obtain a palindrome (90900909).

The spelling of 204243311 in words is "two hundred four million, two hundred forty-three thousand, three hundred eleven".