204554 has 16 divisors (see below), whose sum is σ = 369600. Its totient is φ = 82944.

The previous prime is 204521. The next prime is 204557. The reversal of 204554 is 455402.

It is a happy number.

204554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (204557) by changing a digit.

204554 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (23100).

2²⁰⁴⁵⁵⁴ is an apocalyptic number.

204554 is a deficient number, since it is larger than the sum of its proper divisors (165046).

204554 is a wasteful number, since it uses less digits than its factorization.

204554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 204554 is about 452.2764641234. The cubic root of 204554 is about 58.9208936956.

Adding to 204554 its reverse (455402), we get a palindrome (659956).

The spelling of 204554 in words is "two hundred four thousand, five hundred fifty-four".