22105811 has 12 divisors (see below), whose sum is σ = 27693792. Its totient is φ = 17489808.

The previous prime is 22105807. The next prime is 22105813. The reversal of 22105811 is 11850122.

It is a happy number.

It is not a de Polignac number, because 22105811 - 2² = 22105807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22105813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16715 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (2307816).

Almost surely, 2^22105811 is an apocalyptic number.

22105811 is a deficient number, since it is larger than the sum of its proper divisors (5587981).

22105811 is a wasteful number, since it uses less digits than its factorization.

22105811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34730 (or 34723 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 22105811 is about 4701.6817204060. The cubic root of 22105811 is about 280.6524368886.

Adding to 22105811 its reverse (11850122), we get a palindrome (33955933).

The spelling of 22105811 in words is "twenty-two million, one hundred five thousand, eight hundred eleven".