22108506 has 48 divisors (see below), whose sum is σ = 51901920. Its totient is φ = 6259680.

The previous prime is 22108453. The next prime is 22108507. The reversal of 22108506 is 60580122.

It is not an unprimeable number, because it can be changed into a prime (22108507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40596 + ... + 41136.

It is an arithmetic number, because the mean of its divisors is an integer number (1081290).

Almost surely, 2^22108506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22108506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25950960).

22108506 is an abundant number, since it is smaller than the sum of its proper divisors (29793414).

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

22108506 is a wasteful number, since it uses less digits than its factorization.

22108506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 22108506 is about 4701.9683112501. The cubic root of 22108506 is about 280.6638415457.

Adding to 22108506 its reverse (60580122), we get a palindrome (82688628).

The spelling of 22108506 in words is "twenty-two million, one hundred eight thousand, five hundred six".