22140224 has 56 divisors (see below), whose sum is σ = 46329600. Its totient is φ = 10483200.

The previous prime is 22140221. The next prime is 22140233. The reversal of 22140224 is 42204122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140221) 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, 146549 + ... + 146699.

Almost surely, 2^22140224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22140224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23164800).

22140224 is an abundant number, since it is smaller than the sum of its proper divisors (24189376).

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

22140224 is a wasteful number, since it uses less digits than its factorization.

22140224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22140224 is about 4705.3399452112. The cubic root of 22140224 is about 280.7979956730.

Adding to 22140224 its reverse (42204122), we get a palindrome (64344346).

The spelling of 22140224 in words is "twenty-two million, one hundred forty thousand, two hundred twenty-four".