204113243 has 4 divisors (see below), whose sum is σ = 204147648. Its totient is φ = 204078840.

The previous prime is 204113209. The next prime is 204113249. The reversal of 204113243 is 342311402.

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 204113243 - 2¹⁰ = 204112219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204113249) 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, 5771 + ... + 21012.

It is an arithmetic number, because the mean of its divisors is an integer number (51036912).

Almost surely, 2^204113243 is an apocalyptic number.

204113243 is a deficient number, since it is larger than the sum of its proper divisors (34405).

204113243 is an equidigital number, since it uses as much as digits as its factorization.

204113243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34404.

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

The square root of 204113243 is about 14286.8206050192. The cubic root of 204113243 is about 588.7854388207.

Adding to 204113243 its reverse (342311402), we get a palindrome (546424645).

The spelling of 204113243 in words is "two hundred four million, one hundred thirteen thousand, two hundred forty-three".