6223221 has 12 divisors (see below), whose sum is σ = 9116640. Its totient is φ = 4089960.

The previous prime is 6223211. The next prime is 6223247. The reversal of 6223221 is 1223226.

6223221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6223221 - 2¹⁰ = 6222197 is a prime.

It is a super-2 number, since 2×6223221² = 77456959229682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6223194 and 6223203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6223201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4231 + ... + 5508.

It is an arithmetic number, because the mean of its divisors is an integer number (759720).

Almost surely, 2^6223221 is an apocalyptic number.

It is an amenable number.

6223221 is a deficient number, since it is larger than the sum of its proper divisors (2893419).

6223221 is a wasteful number, since it uses less digits than its factorization.

6223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816 (or 9813 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 6223221 is about 2494.6384507579. The cubic root of 6223221 is about 183.9381191566.

Adding to 6223221 its reverse (1223226), we get a palindrome (7446447).

The spelling of 6223221 in words is "six million, two hundred twenty-three thousand, two hundred twenty-one".