22566881 has 4 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 22554564.

The previous prime is 22566857. The next prime is 22566893. The reversal of 22566881 is 18866522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22566881 - 2¹⁴ = 22550497 is a prime.

It is a super-2 number, since 2×22566881² = 1018528236136322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22566821) 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 3 ways as a sum of consecutive naturals, for example, 2801 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (5644800).

Almost surely, 2^22566881 is an apocalyptic number.

It is an amenable number.

22566881 is a deficient number, since it is larger than the sum of its proper divisors (12319).

22566881 is a wasteful number, since it uses less digits than its factorization.

22566881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12318.

The product of its digits is 46080, while the sum is 38.

The square root of 22566881 is about 4750.4611355110. The cubic root of 22566881 is about 282.5902538783.

The spelling of 22566881 in words is "twenty-two million, five hundred sixty-six thousand, eight hundred eighty-one".