22505224 has 64 divisors (see below), whose sum is σ = 51114240. Its totient is φ = 9081600.

The previous prime is 22505207. The next prime is 22505239. The reversal of 22505224 is 42250522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22505195 and 22505204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130002 + ... + 130174.

It is an arithmetic number, because the mean of its divisors is an integer number (798660).

Almost surely, 2^22505224 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 22505224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25557120).

22505224 is an abundant number, since it is smaller than the sum of its proper divisors (28609016).

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

22505224 is a wasteful number, since it uses less digits than its factorization.

22505224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22505224 is about 4743.9671162435. The cubic root of 22505224 is about 282.3326557390.

Adding to 22505224 its reverse (42250522), we get a palindrome (64755746).

The spelling of 22505224 in words is "twenty-two million, five hundred five thousand, two hundred twenty-four".