22081144 has 8 divisors (see below), whose sum is σ = 41402160. Its totient is φ = 11040568.

The previous prime is 22081133. The next prime is 22081159. The reversal of 22081144 is 44118022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1380064 + ... + 1380079.

It is an arithmetic number, because the mean of its divisors is an integer number (5175270).

Almost surely, 2^22081144 is an apocalyptic number.

It is an amenable number.

22081144 is a deficient number, since it is larger than the sum of its proper divisors (19321016).

22081144 is a wasteful number, since it uses less digits than its factorization.

22081144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760149 (or 2760145 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 22081144 is about 4699.0577778955. The cubic root of 22081144 is about 280.5480083858.

Adding to 22081144 its reverse (44118022), we get a palindrome (66199166).

The spelling of 22081144 in words is "twenty-two million, eighty-one thousand, one hundred forty-four".