22216560 has 40 divisors (see below), whose sum is σ = 68872080. Its totient is φ = 5924352.

The previous prime is 22216549. The next prime is 22216561. The reversal of 22216560 is 6561222.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a self number, because there is not a number n which added to its sum of digits gives 22216560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46045 + ... + 46524.

It is an arithmetic number, because the mean of its divisors is an integer number (1721802).

Almost surely, 2^22216560 is an apocalyptic number.

22216560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22216560 is an abundant number, since it is smaller than the sum of its proper divisors (46655520).

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

22216560 is a wasteful number, since it uses less digits than its factorization.

22216560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92585 (or 92579 counting only the distinct ones).

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

The square root of 22216560 is about 4713.4446002897. Note that the first 3 decimals coincide. The cubic root of 22216560 is about 281.1203412230.

Adding to 22216560 its reverse (6561222), we get a palindrome (28777782).

The spelling of 22216560 in words is "twenty-two million, two hundred sixteen thousand, five hundred sixty".