22091445 has 12 divisors (see below), whose sum is σ = 38291916. Its totient is φ = 11782080.

The previous prime is 22091423. The next prime is 22091453. The reversal of 22091445 is 54419022.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 19000881 = 1758^2 + 4359^2 .

It is not a de Polignac number, because 22091445 - 2⁹ = 22090933 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245416 + ... + 245505.

It is an arithmetic number, because the mean of its divisors is an integer number (3190993).

Almost surely, 2^22091445 is an apocalyptic number.

It is an amenable number.

22091445 is a deficient number, since it is larger than the sum of its proper divisors (16200471).

22091445 is a wasteful number, since it uses less digits than its factorization.

22091445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490932 (or 490929 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 22091445 is about 4700.1537208904. The cubic root of 22091445 is about 280.5916274387.

The spelling of 22091445 in words is "twenty-two million, ninety-one thousand, four hundred forty-five".