22501444 has 12 divisors (see below), whose sum is σ = 45002944. Its totient is φ = 9643464.

The previous prime is 22501441. The next prime is 22501463. The reversal of 22501444 is 44410522.

It is a happy number.

22501444 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501441) 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 3 ways as a sum of consecutive naturals, for example, 401784 + ... + 401839.

Almost surely, 2^22501444 is an apocalyptic number.

It is an amenable number.

22501444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22501444 is a wasteful number, since it uses less digits than its factorization.

22501444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803634 (or 803632 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22501444 is about 4743.5686987752. The cubic root of 22501444 is about 282.3168478952.

Adding to 22501444 its reverse (44410522), we get a palindrome (66911966).

The spelling of 22501444 in words is "twenty-two million, five hundred one thousand, four hundred forty-four".