204218 has 16 divisors (see below), whose sum is σ = 362880. Its totient is φ = 84336.

The previous prime is 204173. The next prime is 204233. The reversal of 204218 is 812402.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204196 and 204205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 657.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2²⁰⁴²¹⁸ is an apocalyptic number.

204218 is a deficient number, since it is larger than the sum of its proper divisors (158662).

204218 is a wasteful number, since it uses less digits than its factorization.

204218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 204218 is about 451.9048572432. The cubic root of 204218 is about 58.8886149006. Note that the first 3 decimals are identical.

The spelling of 204218 in words is "two hundred four thousand, two hundred eighteen".