204115155 has 8 divisors (see below), whose sum is σ = 326584272. Its totient is φ = 108861408.

The previous prime is 204115151. The next prime is 204115169. The reversal of 204115155 is 551511402.

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

It is not a de Polignac number, because 204115155 - 2² = 204115151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204115151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6803824 + ... + 6803853.

It is an arithmetic number, because the mean of its divisors is an integer number (40823034).

Almost surely, 2^204115155 is an apocalyptic number.

204115155 is a deficient number, since it is larger than the sum of its proper divisors (122469117).

204115155 is a wasteful number, since it uses less digits than its factorization.

204115155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607685.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 204115155 is about 14286.8875196804. The cubic root of 204115155 is about 588.7872772679.

Adding to 204115155 its reverse (551511402), we get a palindrome (755626557).

The spelling of 204115155 in words is "two hundred four million, one hundred fifteen thousand, one hundred fifty-five".