22566816 has 48 divisors (see below), whose sum is σ = 65822400. Its totient is φ = 7521984.

The previous prime is 22566809. The next prime is 22566821. The reversal of 22566816 is 61866522.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×22566816² = 1018522368755712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12196 + ... + 13923.

It is an arithmetic number, because the mean of its divisors is an integer number (1371300).

Almost surely, 2^22566816 is an apocalyptic number.

It is an amenable number.

22566816 is an abundant number, since it is smaller than the sum of its proper divisors (43255584).

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

22566816 is a wasteful number, since it uses less digits than its factorization.

22566816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26138 (or 26124 counting only the distinct ones).

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

The square root of 22566816 is about 4750.4542940649. The cubic root of 22566816 is about 282.5899825606.

The spelling of 22566816 in words is "twenty-two million, five hundred sixty-six thousand, eight hundred sixteen".