22281843 has 4 divisors (see below), whose sum is σ = 29709128. Its totient is φ = 14854560.

The previous prime is 22281829. The next prime is 22281877. The reversal of 22281843 is 34818222.

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

It is not a de Polignac number, because 22281843 - 2⁹ = 22281331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22281843.

It is not an unprimeable number, because it can be changed into a prime (22281943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713638 + ... + 3713643.

It is an arithmetic number, because the mean of its divisors is an integer number (7427282).

Almost surely, 2^22281843 is an apocalyptic number.

22281843 is a deficient number, since it is larger than the sum of its proper divisors (7427285).

22281843 is an equidigital number, since it uses as much as digits as its factorization.

22281843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427284.

The product of its digits is 6144, while the sum is 30.

The square root of 22281843 is about 4720.3647104858. The cubic root of 22281843 is about 281.3954278021.

The spelling of 22281843 in words is "twenty-two million, two hundred eighty-one thousand, eight hundred forty-three".