204901155 has 24 divisors (see below), whose sum is σ = 355812912. Its totient is φ = 109080384.

The previous prime is 204901141. The next prime is 204901157. The reversal of 204901155 is 551109402.

204901155 is a `hidden beast` number, since 20 + 490 + 1 + 155 = 666.

It is not a de Polignac number, because 204901155 - 2⁴ = 204901139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204901157) 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 23 ways as a sum of consecutive naturals, for example, 22537 + ... + 30293.

It is an arithmetic number, because the mean of its divisors is an integer number (14825538).

Almost surely, 2^204901155 is an apocalyptic number.

204901155 is a deficient number, since it is larger than the sum of its proper divisors (150911757).

204901155 is a wasteful number, since it uses less digits than its factorization.

204901155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355 (or 8352 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 204901155 is about 14314.3688299554. The cubic root of 204901155 is about 589.5420702170.

The spelling of 204901155 in words is "two hundred four million, nine hundred one thousand, one hundred fifty-five".