22273216 has 56 divisors (see below), whose sum is σ = 51206400. Its totient is φ = 9414912.

The previous prime is 22273201. The next prime is 22273217. The reversal of 22273216 is 61237222.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (22273217) 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, 36885 + ... + 37483.

It is an arithmetic number, because the mean of its divisors is an integer number (914400).

Almost surely, 2^22273216 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 22273216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25603200).

22273216 is an abundant number, since it is smaller than the sum of its proper divisors (28933184).

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

22273216 is an equidigital number, since it uses as much as digits as its factorization.

22273216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 691 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 22273216 is about 4719.4508155081. The cubic root of 22273216 is about 281.3591065737.

The spelling of 22273216 in words is "twenty-two million, two hundred seventy-three thousand, two hundred sixteen".