22218122 has 16 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 10771084.

The previous prime is 22218121. The next prime is 22218127. The reversal of 22218122 is 22181222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22218094 and 22218103.

It is not an unprimeable number, because it can be changed into a prime (22218121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207593 + ... + 207699.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^22218122 is an apocalyptic number.

22218122 is a deficient number, since it is larger than the sum of its proper divisors (12151798).

22218122 is an frugal number, since it uses more digits than its factorization.

22218122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 156 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 22218122 is about 4713.6102936072. The cubic root of 22218122 is about 281.1269293969.

Adding to 22218122 its reverse (22181222), we get a palindrome (44399344).

The spelling of 22218122 in words is "twenty-two million, two hundred eighteen thousand, one hundred twenty-two".