6544223 has 4 divisors (see below), whose sum is σ = 7479120. Its totient is φ = 5609328.

The previous prime is 6544217. The next prime is 6544243. The reversal of 6544223 is 3224456.

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 6544223 - 2⁴ = 6544207 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6544192 and 6544201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467438 + ... + 467451.

It is an arithmetic number, because the mean of its divisors is an integer number (1869780).

Almost surely, 2^6544223 is an apocalyptic number.

6544223 is a deficient number, since it is larger than the sum of its proper divisors (934897).

6544223 is an equidigital number, since it uses as much as digits as its factorization.

6544223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934896.

The product of its digits is 5760, while the sum is 26.

The square root of 6544223 is about 2558.1678991028. The cubic root of 6544223 is about 187.0478396672.

Adding to 6544223 its reverse (3224456), we get a palindrome (9768679).

The spelling of 6544223 in words is "six million, five hundred forty-four thousand, two hundred twenty-three".