218204 has 12 divisors (see below), whose sum is σ = 436464. Its totient is φ = 93504.

The previous prime is 218191. The next prime is 218213. The reversal of 218204 is 402812.

218204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

218204 is an admirable number.

It is a super-2 number, since 2×218204² = 95225971232, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869 + ... + 3924.

It is an arithmetic number, because the mean of its divisors is an integer number (36372).

2²¹⁸²⁰⁴ is an apocalyptic number.

It is an amenable number.

218204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218204 is a wasteful number, since it uses less digits than its factorization.

218204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7804 (or 7802 counting only the distinct ones).

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

The square root of 218204 is about 467.1231101112. The cubic root of 218204 is about 60.2033838784.

The spelling of 218204 in words is "two hundred eighteen thousand, two hundred four".