22216723 has 4 divisors (see below), whose sum is σ = 22309920. Its totient is φ = 22123528.

The previous prime is 22216673. The next prime is 22216751. The reversal of 22216723 is 32761222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22216723 - 2⁹ = 22216211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22216123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46240 + ... + 46717.

It is an arithmetic number, because the mean of its divisors is an integer number (5577480).

Almost surely, 2^22216723 is an apocalyptic number.

22216723 is a deficient number, since it is larger than the sum of its proper divisors (93197).

22216723 is an equidigital number, since it uses as much as digits as its factorization.

22216723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93196.

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

The square root of 22216723 is about 4713.4618912218. The cubic root of 22216723 is about 281.1210287357.

Adding to 22216723 its reverse (32761222), we get a palindrome (54977945).

The spelling of 22216723 in words is "twenty-two million, two hundred sixteen thousand, seven hundred twenty-three".