22218200 has 24 divisors (see below), whose sum is σ = 51657780. Its totient is φ = 8887200.

The previous prime is 22218199. The next prime is 22218211. The reversal of 22218200 is 281222.

It is a super-2 number, since 2×22218200² = 987296822480000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55346 + ... + 55745.

Almost surely, 2^22218200 is an apocalyptic number.

22218200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22218200 is an abundant number, since it is smaller than the sum of its proper divisors (29439580).

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

22218200 is a wasteful number, since it uses less digits than its factorization.

22218200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111107 (or 111098 counting only the distinct ones).

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

The square root of 22218200 is about 4713.6185675126. The cubic root of 22218200 is about 281.1272583757.

Adding to 22218200 its reverse (281222), we get a palindrome (22499422).

The spelling of 22218200 in words is "twenty-two million, two hundred eighteen thousand, two hundred".