22506244 has 6 divisors (see below), whose sum is σ = 39385934. Its totient is φ = 11253120.

The previous prime is 22506191. The next prime is 22506247. The reversal of 22506244 is 44260522.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 57600 = 4738^2 + 240^2 .

It is not an unprimeable number, because it can be changed into a prime (22506247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2813277 + ... + 2813284.

Almost surely, 2^22506244 is an apocalyptic number.

It is an amenable number.

22506244 is a deficient number, since it is larger than the sum of its proper divisors (16879690).

22506244 is a wasteful number, since it uses less digits than its factorization.

22506244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626565 (or 5626563 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 22506244 is about 4744.0746199865. The cubic root of 22506244 is about 282.3369210444.

Adding to 22506244 its reverse (44260522), we get a palindrome (66766766).

The spelling of 22506244 in words is "twenty-two million, five hundred six thousand, two hundred forty-four".