204005155 has 8 divisors (see below), whose sum is σ = 245738592. Its totient is φ = 162582528.

The previous prime is 204005129. The next prime is 204005159. The reversal of 204005155 is 551500402.

204005155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204005155 - 2¹³ = 203996963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204005159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76254 + ... + 78883.

It is an arithmetic number, because the mean of its divisors is an integer number (30717324).

Almost surely, 2^204005155 is an apocalyptic number.

204005155 is a deficient number, since it is larger than the sum of its proper divisors (41733437).

204005155 is a wasteful number, since it uses less digits than its factorization.

204005155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155405.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 204005155 is about 14283.0373170415. The cubic root of 204005155 is about 588.6814901883.

Adding to 204005155 its reverse (551500402), we get a palindrome (755505557).

The spelling of 204005155 in words is "two hundred four million, five thousand, one hundred fifty-five".