22224100 has 54 divisors (see below), whose sum is σ = 51296630. Its totient is φ = 8355840.

The previous prime is 22224089. The next prime is 22224109. The reversal of 22224100 is 142222.

It can be written as a sum of positive squares in 9 ways, for example, as 1865956 + 20358144 = 1366^2 + 4512^2 .

It is not an unprimeable number, because it can be changed into a prime (22224109) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28516 + ... + 29284.

Almost surely, 2^22224100 is an apocalyptic number.

22224100 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 22224100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25648315).

22224100 is an abundant number, since it is smaller than the sum of its proper divisors (29072530).

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

22224100 is a wasteful number, since it uses less digits than its factorization.

22224100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22224100 is about 4714.2443721131. The cubic root of 22224100 is about 281.1521404398.

Adding to 22224100 its reverse (142222), we get a palindrome (22366322).

The spelling of 22224100 in words is "twenty-two million, two hundred twenty-four thousand, one hundred".