22012200 has 144 divisors (see below), whose sum is σ = 84533280. Its totient is φ = 5028480.

The previous prime is 22012187. The next prime is 22012231. The reversal of 22012200 is 221022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11727 + ... + 13473.

Almost surely, 2^22012200 is an apocalyptic number.

22012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42266640).

22012200 is an abundant number, since it is smaller than the sum of its proper divisors (62521080).

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

22012200 is a wasteful number, since it uses less digits than its factorization.

22012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22012200 is about 4691.7161039432. The cubic root of 22012200 is about 280.2557187667.

Adding to 22012200 its reverse (221022), we get a palindrome (22233222).

The spelling of 22012200 in words is "twenty-two million, twelve thousand, two hundred".