22105665 has 24 divisors (see below), whose sum is σ = 38683008. Its totient is φ = 11676960.

The previous prime is 22105649. The next prime is 22105679. The reversal of 22105665 is 56650122.

It is not a de Polignac number, because 22105665 - 2⁴ = 22105649 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2520 + ... + 7110.

It is an arithmetic number, because the mean of its divisors is an integer number (1611792).

Almost surely, 2^22105665 is an apocalyptic number.

It is an amenable number.

22105665 is a deficient number, since it is larger than the sum of its proper divisors (16577343).

22105665 is a wasteful number, since it uses less digits than its factorization.

22105665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709 (or 4706 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22105665 is about 4701.6661940210. Note that the first 3 decimals coincide. The cubic root of 22105665 is about 280.6518190217.

Adding to 22105665 its reverse (56650122), we get a palindrome (78755787).

It can be divided in two parts, 2210 and 5665, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 22105665 in words is "twenty-two million, one hundred five thousand, six hundred sixty-five".