204040253 has 2 divisors, whose sum is σ = 204040254. Its totient is φ = 204040252.

The previous prime is 204040247. The next prime is 204040271. The reversal of 204040253 is 352040402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195496324 + 8543929 = 13982^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 204040253 - 2¹⁶ = 203974717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204040223) 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 as a sum of consecutive naturals, namely, 102020126 + 102020127.

It is an arithmetic number, because the mean of its divisors is an integer number (102020127).

Almost surely, 2^204040253 is an apocalyptic number.

It is an amenable number.

204040253 is a deficient number, since it is larger than the sum of its proper divisors (1).

204040253 is an equidigital number, since it uses as much as digits as its factorization.

204040253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 204040253 is about 14284.2659244359. The cubic root of 204040253 is about 588.7152480904.

Adding to 204040253 its reverse (352040402), we get a palindrome (556080655).

The spelling of 204040253 in words is "two hundred four million, forty thousand, two hundred fifty-three".