204905255 has 4 divisors (see below), whose sum is σ = 245886312. Its totient is φ = 163924200.

The previous prime is 204905237. The next prime is 204905263. The reversal of 204905255 is 552509402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552509402 = 2 ⋅276254701.

It is a de Polignac number, because none of the positive numbers 2^k-204905255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20490521 + ... + 20490530.

It is an arithmetic number, because the mean of its divisors is an integer number (61471578).

Almost surely, 2^204905255 is an apocalyptic number.

204905255 is a deficient number, since it is larger than the sum of its proper divisors (40981057).

204905255 is an equidigital number, since it uses as much as digits as its factorization.

204905255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40981056.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 204905255 is about 14314.5120419803. The cubic root of 204905255 is about 589.5460023672.

The spelling of 204905255 in words is "two hundred four million, nine hundred five thousand, two hundred fifty-five".