22065216 has 56 divisors (see below), whose sum is σ = 59826144. Its totient is φ = 7173120.

The previous prime is 22065203. The next prime is 22065221. The reversal of 22065216 is 61256022.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6471 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (1068324).

Almost surely, 2^22065216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22065216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29913072).

22065216 is an abundant number, since it is smaller than the sum of its proper divisors (37760928).

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

22065216 is a wasteful number, since it uses less digits than its factorization.

22065216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2849 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22065216 is about 4697.3626643043. The cubic root of 22065216 is about 280.4805353787.

The spelling of 22065216 in words is "twenty-two million, sixty-five thousand, two hundred sixteen".