204243355 has 16 divisors (see below), whose sum is σ = 261244224. Its totient is φ = 152755200.

The previous prime is 204243353. The next prime is 204243371. The reversal of 204243355 is 553342402.

It is not a de Polignac number, because 204243355 - 2¹ = 204243353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204243353) 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, 4879 + ... + 20791.

It is an arithmetic number, because the mean of its divisors is an integer number (16327764).

Almost surely, 2^204243355 is an apocalyptic number.

204243355 is a deficient number, since it is larger than the sum of its proper divisors (57000869).

204243355 is a wasteful number, since it uses less digits than its factorization.

204243355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16086.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 204243355 is about 14291.3734469434. The cubic root of 204243355 is about 588.9105193524.

Adding to 204243355 its reverse (553342402), we get a palindrome (757585757).

The spelling of 204243355 in words is "two hundred four million, two hundred forty-three thousand, three hundred fifty-five".