22100845 has 16 divisors (see below), whose sum is σ = 29261232. Its totient is φ = 15920640.

The previous prime is 22100807. The next prime is 22100851. The reversal of 22100845 is 54800122.

It can be written as a sum of positive squares in 8 ways, for example, as 9126441 + 12974404 = 3021^2 + 3602^2 .

It is not a de Polignac number, because 22100845 - 2⁹ = 22100333 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, 1482 + ... + 6811.

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

Almost surely, 2^22100845 is an apocalyptic number.

It is an amenable number.

22100845 is a deficient number, since it is larger than the sum of its proper divisors (7160387).

22100845 is a wasteful number, since it uses less digits than its factorization.

22100845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8352.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 22100845 is about 4701.1535818350. The cubic root of 22100845 is about 280.6314194228.

Adding to 22100845 its reverse (54800122), we get a palindrome (76900967).

The spelling of 22100845 in words is "twenty-two million, one hundred thousand, eight hundred forty-five".