22806505 has 4 divisors (see below), whose sum is σ = 27367812. Its totient is φ = 18245200.

The previous prime is 22806457. The next prime is 22806521. The reversal of 22806505 is 50560822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12257001 + 10549504 = 3501^2 + 3248^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22806505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2280646 + ... + 2280655.

It is an arithmetic number, because the mean of its divisors is an integer number (6841953).

Almost surely, 2^22806505 is an apocalyptic number.

It is an amenable number.

22806505 is a deficient number, since it is larger than the sum of its proper divisors (4561307).

22806505 is an equidigital number, since it uses as much as digits as its factorization.

22806505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561306.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 22806505 is about 4775.6156671156. The cubic root of 22806505 is about 283.5869524574.

The spelling of 22806505 in words is "twenty-two million, eight hundred six thousand, five hundred five".