6773221 has 24 divisors (see below), whose sum is σ = 8784384. Its totient is φ = 5186160.

The previous prime is 6773213. The next prime is 6773233. The reversal of 6773221 is 1223776.

It is not a de Polignac number, because 6773221 - 2³ = 6773213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6773221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6773251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218476 + ... + 218506.

It is an arithmetic number, because the mean of its divisors is an integer number (366016).

Almost surely, 2^6773221 is an apocalyptic number.

It is an amenable number.

6773221 is a deficient number, since it is larger than the sum of its proper divisors (2011163).

6773221 is an frugal number, since it uses more digits than its factorization.

6773221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 51 counting only the distinct ones).

The product of its digits is 3528, while the sum is 28.

The square root of 6773221 is about 2602.5412580783. The cubic root of 6773221 is about 189.2046252000.

Adding to 6773221 its reverse (1223776), we get a palindrome (7996997).

The spelling of 6773221 in words is "six million, seven hundred seventy-three thousand, two hundred twenty-one".