204158 has 4 divisors (see below), whose sum is σ = 306240. Its totient is φ = 102078.

The previous prime is 204151. The next prime is 204161. The reversal of 204158 is 851402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851402 = 2 ⋅425701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51038 + ... + 51041.

It is an arithmetic number, because the mean of its divisors is an integer number (76560).

2²⁰⁴¹⁵⁸ is an apocalyptic number.

204158 is a deficient number, since it is larger than the sum of its proper divisors (102082).

204158 is a wasteful number, since it uses less digits than its factorization.

204158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102081.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 204158 is about 451.8384667113. The cubic root of 204158 is about 58.8828471051.

The spelling of 204158 in words is "two hundred four thousand, one hundred fifty-eight".