22506445 has 16 divisors (see below), whose sum is σ = 29261232. Its totient is φ = 16519680.

The previous prime is 22506437. The next prime is 22506479. The reversal of 22506445 is 54460522.

It can be written as a sum of positive squares in 8 ways, for example, as 3374569 + 19131876 = 1837^2 + 4374^2 .

It is not a de Polignac number, because 22506445 - 2³ = 22506437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10809 + ... + 12721.

It is an arithmetic number, because the mean of its divisors is an integer number (1828827).

Almost surely, 2^22506445 is an apocalyptic number.

It is an amenable number.

22506445 is a deficient number, since it is larger than the sum of its proper divisors (6754787).

22506445 is a wasteful number, since it uses less digits than its factorization.

22506445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 22506445 is about 4744.0958042603. The cubic root of 22506445 is about 282.3377615452.

Adding to 22506445 its reverse (54460522), we get a palindrome (76966967).

The spelling of 22506445 in words is "twenty-two million, five hundred six thousand, four hundred forty-five".