218822 has 16 divisors (see below), whose sum is σ = 352512. Its totient is φ = 101640.

The previous prime is 218819. The next prime is 218833. The reversal of 218822 is 228812.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3047 + ... + 3117.

It is an arithmetic number, because the mean of its divisors is an integer number (22032).

2²¹⁸⁸²² is an apocalyptic number.

218822 is a deficient number, since it is larger than the sum of its proper divisors (133690).

218822 is a wasteful number, since it uses less digits than its factorization.

218822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163.

The product of its digits is 512, while the sum is 23.

The square root of 218822 is about 467.7841382518. The cubic root of 218822 is about 60.2601665552.

The spelling of 218822 in words is "two hundred eighteen thousand, eight hundred twenty-two".