22181120 has 144 divisors (see below), whose sum is σ = 60436992. Its totient is φ = 7741440.

The previous prime is 22181069. The next prime is 22181147. The reversal of 22181120 is 2118122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515819 + ... + 515861.

Almost surely, 2^22181120 is an apocalyptic number.

22181120 is a gapful number since it is divisible by the number (20) 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 22181120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30218496).

22181120 is an abundant number, since it is smaller than the sum of its proper divisors (38255872).

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

22181120 is a wasteful number, since it uses less digits than its factorization.

22181120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 22181120 is about 4709.6836411802. The cubic root of 22181120 is about 280.9707800064.

Adding to 22181120 its reverse (2118122), we get a palindrome (24299242).

The spelling of 22181120 in words is "twenty-two million, one hundred eighty-one thousand, one hundred twenty".