22530144 has 96 divisors (see below), whose sum is σ = 72817920. Its totient is φ = 5939712.

The previous prime is 22530139. The next prime is 22530161. The reversal of 22530144 is 44103522.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22530144.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7447 + ... + 10025.

It is an arithmetic number, because the mean of its divisors is an integer number (758520).

Almost surely, 2^22530144 is an apocalyptic number.

22530144 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 22530144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36408960).

22530144 is an abundant number, since it is smaller than the sum of its proper divisors (50287776).

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

22530144 is a wasteful number, since it uses less digits than its factorization.

22530144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2604 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22530144 is about 4746.5928833217. The cubic root of 22530144 is about 282.4368261380.

Adding to 22530144 its reverse (44103522), we get a palindrome (66633666).

The spelling of 22530144 in words is "twenty-two million, five hundred thirty thousand, one hundred forty-four".