2218122 has 12 divisors (see below), whose sum is σ = 4805970. Its totient is φ = 739368.

The previous prime is 2218121. The next prime is 2218127.

It is a happy number.

2218122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 938961 = 1131^2 + 969^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 123229 = 2218122 / (2 + 2 + 1 + 8 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 2218095 and 2218104.

It is not an unprimeable number, because it can be changed into a prime (2218121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61597 + ... + 61632.

2^2218122 is an apocalyptic number.

2218122 is an abundant number, since it is smaller than the sum of its proper divisors (2587848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218122 is a wasteful number, since it uses less digits than its factorization.

2218122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123237 (or 123234 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 2218122 is about 1489.3360937008. The cubic root of 2218122 is about 130.4152794898.

The spelling of 2218122 in words is "two million, two hundred eighteen thousand, one hundred twenty-two".