218044 has 18 divisors (see below), whose sum is σ = 405384. Its totient is φ = 102600.

The previous prime is 218021. The next prime is 218047. The reversal of 218044 is 440812.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218047) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1369 + ... + 1519.

2²¹⁸⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

218044 is a deficient number, since it is larger than the sum of its proper divisors (187340).

218044 is a wasteful number, since it uses less digits than its factorization.

218044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 218044 is about 466.9518176429. The cubic root of 218044 is about 60.1886653936.

218044 divided by its sum of digits (19) gives a triangular number (11476 = T₁₅₁).

Adding to 218044 its reverse (440812), we get a palindrome (658856).

The spelling of 218044 in words is "two hundred eighteen thousand, forty-four".