22101144 has 48 divisors (see below), whose sum is σ = 59841000. Its totient is φ = 6799104.

The previous prime is 22101143. The next prime is 22101151. The reversal of 22101144 is 44110122.

It is a super-2 number, since 2×22101144² = 976921132217472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101143) 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 11 ways as a sum of consecutive naturals, for example, 1332 + ... + 6780.

Almost surely, 2^22101144 is an apocalyptic number.

22101144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22101144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29920500).

22101144 is an abundant number, since it is smaller than the sum of its proper divisors (37739856).

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

22101144 is a wasteful number, since it uses less digits than its factorization.

22101144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5467 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 22101144 is about 4701.1853824328. The cubic root of 22101144 is about 280.6326849614.

Adding to 22101144 its reverse (44110122), we get a palindrome (66211266).

The spelling of 22101144 in words is "twenty-two million, one hundred one thousand, one hundred forty-four".