218122 has 8 divisors (see below), whose sum is σ = 329472. Its totient is φ = 108300.

The previous prime is 218117. The next prime is 218131. The reversal of 218122 is 221812.

218122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 218096 and 218105.

It is an unprimeable number.

218122 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (41184).

2²¹⁸¹²² is an apocalyptic number.

218122 is a deficient number, since it is larger than the sum of its proper divisors (111350).

218122 is a wasteful number, since it uses less digits than its factorization.

218122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its digits is 64, while the sum is 16.

The square root of 218122 is about 467.0353305693. The cubic root of 218122 is about 60.1958415541.

Adding to 218122 its reverse (221812), we get a palindrome (439934).

The spelling of 218122 in words is "two hundred eighteen thousand, one hundred twenty-two".