22566138 has 24 divisors (see below), whose sum is σ = 51650208. Its totient is φ = 6438672.

The previous prime is 22566133. The next prime is 22566149. The reversal of 22566138 is 83166522.

It is a junction number, because it is equal to n+sod(n) for n = 22566099 and 22566108.

It is not an unprimeable number, because it can be changed into a prime (22566133) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 30420 + ... + 31152.

It is an arithmetic number, because the mean of its divisors is an integer number (2152092).

Almost surely, 2^22566138 is an apocalyptic number.

22566138 is an abundant number, since it is smaller than the sum of its proper divisors (29084070).

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

22566138 is an frugal number, since it uses more digits than its factorization.

22566138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 745 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 22566138 is about 4750.3829319330. The cubic root of 22566138 is about 282.5871524770.

The spelling of 22566138 in words is "twenty-two million, five hundred sixty-six thousand, one hundred thirty-eight".