22194505 has 4 divisors (see below), whose sum is σ = 26633412. Its totient is φ = 17755600.

The previous prime is 22194479. The next prime is 22194539. The reversal of 22194505 is 50549122.

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 7225344 + 14969161 = 2688^2 + 3869^2 .

It is not a de Polignac number, because 22194505 - 2¹⁹ = 21670217 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2219446 + ... + 2219455.

It is an arithmetic number, because the mean of its divisors is an integer number (6658353).

Almost surely, 2^22194505 is an apocalyptic number.

It is an amenable number.

22194505 is a deficient number, since it is larger than the sum of its proper divisors (4438907).

22194505 is an equidigital number, since it uses as much as digits as its factorization.

22194505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438906.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 22194505 is about 4711.1044352678. The cubic root of 22194505 is about 281.0272850833.

It can be divided in two parts, 2219 and 4505, that added together give a square (6724 = 82²).

The spelling of 22194505 in words is "twenty-two million, one hundred ninety-four thousand, five hundred five".