218229 has 16 divisors (see below), whose sum is σ = 336960. Its totient is φ = 124160.

The previous prime is 218227. The next prime is 218233. The reversal of 218229 is 922812.

It is a cyclic number.

It is not a de Polignac number, because 218229 - 2¹ = 218227 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218199 and 218208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2²¹⁸²²⁹ is an apocalyptic number.

It is an amenable number.

218229 is a deficient number, since it is larger than the sum of its proper divisors (118731).

218229 is a wasteful number, since it uses less digits than its factorization.

218229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its digits is 576, while the sum is 24.

The square root of 218229 is about 467.1498688858. The cubic root of 218229 is about 60.2056829916.

It can be divided in two parts, 2182 and 29, that added together give a triangular number (2211 = T₆₆).

The spelling of 218229 in words is "two hundred eighteen thousand, two hundred twenty-nine".