2644223 has 4 divisors (see below), whose sum is σ = 2694168. Its totient is φ = 2594280.

The previous prime is 2644219. The next prime is 2644247. The reversal of 2644223 is 3224462.

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

It is a cyclic number.

It is not a de Polignac number, because 2644223 - 2² = 2644219 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 6² + 4 + 4 + 2¹⁰ + 2²⁰ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24893 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (673542).

2^2644223 is an apocalyptic number.

2644223 is a deficient number, since it is larger than the sum of its proper divisors (49945).

2644223 is an equidigital number, since it uses as much as digits as its factorization.

2644223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49944.

The product of its digits is 2304, while the sum is 23.

The square root of 2644223 is about 1626.1067000661. The cubic root of 2644223 is about 138.2821190716.

Adding to 2644223 its reverse (3224462), we get a palindrome (5868685).

The spelling of 2644223 in words is "two million, six hundred forty-four thousand, two hundred twenty-three".