22502144 has 72 divisors (see below), whose sum is σ = 53225760. Its totient is φ = 9289728.

The previous prime is 22502141. The next prime is 22502159. The reversal of 22502144 is 44120522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22502141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51752 + ... + 52184.

Almost surely, 2^22502144 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 22502144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26612880).

22502144 is an abundant number, since it is smaller than the sum of its proper divisors (30723616).

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

22502144 is an equidigital number, since it uses as much as digits as its factorization.

22502144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22502144 is about 4743.6424823125. The cubic root of 22502144 is about 282.3197754073.

Adding to 22502144 its reverse (44120522), we get a palindrome (66622666).

The spelling of 22502144 in words is "twenty-two million, five hundred two thousand, one hundred forty-four".