218222 has 4 divisors (see below), whose sum is σ = 327336. Its totient is φ = 109110.

The previous prime is 218213. The next prime is 218227. The reversal of 218222 is 222812.

It is a semiprime because it is the product of two primes.

218222 is a modest number, since divided by 222 gives 218 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 218222.

It is a congruent number.

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

218222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54554 + ... + 54557.

It is an arithmetic number, because the mean of its divisors is an integer number (81834).

2²¹⁸²²² is an apocalyptic number.

218222 is a deficient number, since it is larger than the sum of its proper divisors (109114).

218222 is a wasteful number, since it uses less digits than its factorization.

218222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109113.

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

The square root of 218222 is about 467.1423765834. The cubic root of 218222 is about 60.2050392576.

The spelling of 218222 in words is "two hundred eighteen thousand, two hundred twenty-two".