22681009 has 12 divisors (see below), whose sum is σ = 25951324. Its totient is φ = 19701504.

The previous prime is 22680991. The next prime is 22681019. The reversal of 22681009 is 90018622.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 90000 + 22591009 = 300^2 + 4753^2 .

It is not a de Polignac number, because 22681009 - 2¹¹ = 22678961 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22681019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739 + ... + 6775.

Almost surely, 2^22681009 is an apocalyptic number.

It is an amenable number.

22681009 is a deficient number, since it is larger than the sum of its proper divisors (3270315).

22681009 is a wasteful number, since it uses less digits than its factorization.

22681009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084 (or 6067 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 22681009 is about 4762.4582937806. The cubic root of 22681009 is about 283.0658364227.

The spelling of 22681009 in words is "twenty-two million, six hundred eighty-one thousand, nine".