22816566 has 40 divisors (see below), whose sum is σ = 51575040. Its totient is φ = 7538832.

The previous prime is 22816559. The next prime is 22816571. The reversal of 22816566 is 66561822.

It is a self number, because there is not a number n which added to its sum of digits gives 22816566.

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 in 19 ways as a sum of consecutive naturals, for example, 20020 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (1289376).

Almost surely, 2^22816566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22816566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25787520).

22816566 is an abundant number, since it is smaller than the sum of its proper divisors (28758474).

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

22816566 is a wasteful number, since it uses less digits than its factorization.

22816566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1241 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 22816566 is about 4776.6689230048. The cubic root of 22816566 is about 283.6286474165.

The spelling of 22816566 in words is "twenty-two million, eight hundred sixteen thousand, five hundred sixty-six".