204156117 has 24 divisors (see below), whose sum is σ = 322964928. Its totient is φ = 123244800.

The previous prime is 204156103. The next prime is 204156137. The reversal of 204156117 is 711651402.

It is a happy number.

204156117 is a `hidden beast` number, since 2 + 0 + 41 + 5 + 611 + 7 = 666.

204156117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204156117 - 2¹⁰ = 204155093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204156137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22117 + ... + 29957.

It is an arithmetic number, because the mean of its divisors is an integer number (13456872).

Almost surely, 2^204156117 is an apocalyptic number.

It is an amenable number.

204156117 is a deficient number, since it is larger than the sum of its proper divisors (118808811).

204156117 is a wasteful number, since it uses less digits than its factorization.

204156117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8121 (or 8118 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 204156117 is about 14288.3210000336. The cubic root of 204156117 is about 588.8266607412.

The spelling of 204156117 in words is "two hundred four million, one hundred fifty-six thousand, one hundred seventeen".