204542253 has 40 divisors (see below), whose sum is σ = 316710240. Its totient is φ = 131453280.

The previous prime is 204542237. The next prime is 204542257. The reversal of 204542253 is 352245402.

It is a happy number.

It is not a de Polignac number, because 204542253 - 2⁴ = 204542237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204542257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 416338 + ... + 416828.

It is an arithmetic number, because the mean of its divisors is an integer number (7917756).

Almost surely, 2^204542253 is an apocalyptic number.

It is an amenable number.

204542253 is a deficient number, since it is larger than the sum of its proper divisors (112167987).

204542253 is a wasteful number, since it uses less digits than its factorization.

204542253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 204542253 is about 14301.8269112726. The cubic root of 204542253 is about 589.1976578318.

Adding to 204542253 its reverse (352245402), we get a palindrome (556787655).

The spelling of 204542253 in words is "two hundred four million, five hundred forty-two thousand, two hundred fifty-three".