22212444 has 24 divisors (see below), whose sum is σ = 54557440. Its totient is φ = 7014384.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212444 is 44421222.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22212444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48484 + ... + 48939.

Almost surely, 2^22212444 is an apocalyptic number.

It is an amenable number.

22212444 is an abundant number, since it is smaller than the sum of its proper divisors (32344996).

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

22212444 is a wasteful number, since it uses less digits than its factorization.

22212444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97449 (or 97447 counting only the distinct ones).

The product of its digits is 1024, while the sum is 21.

The square root of 22212444 is about 4713.0079567088. The cubic root of 22212444 is about 281.1029793573.

Adding to 22212444 its reverse (44421222), we get a palindrome (66633666).

The spelling of 22212444 in words is "twenty-two million, two hundred twelve thousand, four hundred forty-four".