22100445 has 40 divisors (see below), whose sum is σ = 39961944. Its totient is φ = 11684736.

The previous prime is 22100443. The next prime is 22100453. The reversal of 22100445 is 54400122.

22100445 is a `hidden beast` number, since 221 + 0 + 0 + 445 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4435236 + 17665209 = 2106^2 + 4203^2 .

It is not a de Polignac number, because 22100445 - 2¹ = 22100443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100443) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 79647 + ... + 79923.

Almost surely, 2^22100445 is an apocalyptic number.

It is an amenable number.

22100445 is a deficient number, since it is larger than the sum of its proper divisors (17861499).

22100445 is a wasteful number, since it uses less digits than its factorization.

22100445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22100445 is about 4701.1110388928. Note that the first 3 decimals coincide. The cubic root of 22100445 is about 280.6297263768.

Adding to 22100445 its reverse (54400122), we get a palindrome (76500567).

The spelling of 22100445 in words is "twenty-two million, one hundred thousand, four hundred forty-five".