22481289 has 12 divisors (see below), whose sum is σ = 32711796. Its totient is φ = 14877312.

The previous prime is 22481279. The next prime is 22481321. The reversal of 22481289 is 98218422.

It can be written as a sum of positive squares in 2 ways, for example, as 13749264 + 8732025 = 3708^2 + 2955^2 .

It is not a de Polignac number, because 22481289 - 2⁸ = 22481033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22481279) 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, 7884 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (2725983).

Almost surely, 2^22481289 is an apocalyptic number.

It is an amenable number.

22481289 is a deficient number, since it is larger than the sum of its proper divisors (10230507).

22481289 is a wasteful number, since it uses less digits than its factorization.

22481289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18376 (or 18373 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 22481289 is about 4741.4437674616. The cubic root of 22481289 is about 282.2325304054.

The spelling of 22481289 in words is "twenty-two million, four hundred eighty-one thousand, two hundred eighty-nine".