204120243 has 24 divisors (see below), whose sum is σ = 310093056. Its totient is φ = 134152200.

The previous prime is 204120229. The next prime is 204120247. The reversal of 204120243 is 342021402.

It is not a de Polignac number, because 204120243 - 2⁶ = 204120179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204120247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11338 + ... + 23168.

It is an arithmetic number, because the mean of its divisors is an integer number (12920544).

Almost surely, 2^204120243 is an apocalyptic number.

204120243 is a deficient number, since it is larger than the sum of its proper divisors (105972813).

204120243 is an equidigital number, since it uses as much as digits as its factorization.

204120243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11917 (or 11905 counting only the distinct ones).

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

The square root of 204120243 is about 14287.0655839469. The cubic root of 204120243 is about 588.7921694814.

Adding to 204120243 its reverse (342021402), we get a palindrome (546141645).

The spelling of 204120243 in words is "two hundred four million, one hundred twenty thousand, two hundred forty-three".