22115805 has 16 divisors (see below), whose sum is σ = 35614464. Its totient is φ = 11718720.

The previous prime is 22115783. The next prime is 22115831. The reversal of 22115805 is 50851122.

It is not a de Polignac number, because 22115805 - 2⁸ = 22115549 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 15 ways as a sum of consecutive naturals, for example, 2341 + ... + 7050.

It is an arithmetic number, because the mean of its divisors is an integer number (2225904).

Almost surely, 2^22115805 is an apocalyptic number.

It is an amenable number.

22115805 is a deficient number, since it is larger than the sum of its proper divisors (13498659).

22115805 is a wasteful number, since it uses less digits than its factorization.

22115805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9556.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 22115805 is about 4702.7444115112. The cubic root of 22115805 is about 280.6947246815.

Adding to 22115805 its reverse (50851122), we get a palindrome (72966927).

The spelling of 22115805 in words is "twenty-two million, one hundred fifteen thousand, eight hundred five".