204505201255 has 16 divisors (see below), whose sum is σ = 259066846080. Its totient is φ = 154546723872.

The previous prime is 204505201157. The next prime is 204505201267. The reversal of 204505201255 is 552102505402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 204505201255 - 2⁷ = 204505201127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3068889 + ... + 3134818.

It is an arithmetic number, because the mean of its divisors is an integer number (16191677880).

Almost surely, 2^204505201255 is an apocalyptic number.

204505201255 is a deficient number, since it is larger than the sum of its proper divisors (54561644825).

204505201255 is a wasteful number, since it uses less digits than its factorization.

204505201255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204078.

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 204505201255 its reverse (552102505402), we get a palindrome (756607706657).

The spelling of 204505201255 in words is "two hundred four billion, five hundred five million, two hundred one thousand, two hundred fifty-five".