22506212 has 24 divisors (see below), whose sum is σ = 41448120. Its totient is φ = 10679040.

The previous prime is 22506191. The next prime is 22506247. The reversal of 22506212 is 21260522.

It can be written as a sum of positive squares in 4 ways, for example, as 1032256 + 21473956 = 1016^2 + 4634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4214 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (1727005).

Almost surely, 2^22506212 is an apocalyptic number.

It is an amenable number.

22506212 is a deficient number, since it is larger than the sum of its proper divisors (18941908).

22506212 is a wasteful number, since it uses less digits than its factorization.

22506212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22506212 is about 4744.0712473571. The cubic root of 22506212 is about 282.3367872328.

Adding to 22506212 its reverse (21260522), we get a palindrome (43766734).

The spelling of 22506212 in words is "twenty-two million, five hundred six thousand, two hundred twelve".