204240243 has 16 divisors (see below), whose sum is σ = 282078720. Its totient is φ = 131293344.

The previous prime is 204240221. The next prime is 204240263. The reversal of 204240243 is 342042402.

It is not a de Polignac number, because 204240243 - 2¹⁰ = 204239219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204240263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128230 + ... + 129812.

It is an arithmetic number, because the mean of its divisors is an integer number (17629920).

Almost surely, 2^204240243 is an apocalyptic number.

204240243 is a deficient number, since it is larger than the sum of its proper divisors (77838477).

204240243 is a wasteful number, since it uses less digits than its factorization.

204240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 204240243 is about 14291.2645696593. The cubic root of 204240243 is about 588.9075283145.

Adding to 204240243 its reverse (342042402), we get a palindrome (546282645).

The spelling of 204240243 in words is "two hundred four million, two hundred forty thousand, two hundred forty-three".