22216623 has 16 divisors (see below), whose sum is σ = 34801536. Its totient is φ = 12428640.

The previous prime is 22216619. The next prime is 22216657. The reversal of 22216623 is 32661222.

It is not a de Polignac number, because 22216623 - 2² = 22216619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22216593 and 22216602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25465 + ... + 26322.

It is an arithmetic number, because the mean of its divisors is an integer number (2175096).

Almost surely, 2^22216623 is an apocalyptic number.

22216623 is a deficient number, since it is larger than the sum of its proper divisors (12584913).

22216623 is a wasteful number, since it uses less digits than its factorization.

22216623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51814.

The product of its digits is 1728, while the sum is 24.

The square root of 22216623 is about 4713.4512832955. The cubic root of 22216623 is about 281.1206069492.

Adding to 22216623 its reverse (32661222), we get a palindrome (54877845).

The spelling of 22216623 in words is "twenty-two million, two hundred sixteen thousand, six hundred twenty-three".