22112200 has 144 divisors (see below), whose sum is σ = 61714800. Its totient is φ = 7286400.

The previous prime is 22112173. The next prime is 22112201. The reversal of 22112200 is 221122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22112201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 961389 + ... + 961411.

It is an arithmetic number, because the mean of its divisors is an integer number (428575).

Almost surely, 2^22112200 is an apocalyptic number.

22112200 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 22112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30857400).

22112200 is an abundant number, since it is smaller than the sum of its proper divisors (39602600).

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

22112200 is a wasteful number, since it uses less digits than its factorization.

22112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22112200 is about 4702.3611090600. The cubic root of 22112200 is about 280.6794722490.

Adding to 22112200 its reverse (221122), we get a palindrome (22333322).

Multiplying 22112200 by its reverse (221122), we get a square (4889493888400 = 2211220²).

22112200 divided by its reverse (221122) gives a square (100 = 10²).

It can be divided in two parts, 221 and 12200, that added together give a palindrome (12421).

The spelling of 22112200 in words is "twenty-two million, one hundred twelve thousand, two hundred".