6222821 has 8 divisors (see below), whose sum is σ = 6809184. Its totient is φ = 5639920.

The previous prime is 6222817. The next prime is 6222829. The reversal of 6222821 is 1282226.

6222821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6222821 - 2² = 6222817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6222829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4235 + ... + 5511.

It is an arithmetic number, because the mean of its divisors is an integer number (851148).

Almost surely, 2^6222821 is an apocalyptic number.

It is an amenable number.

6222821 is a deficient number, since it is larger than the sum of its proper divisors (586363).

6222821 is a wasteful number, since it uses less digits than its factorization.

6222821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731.

The product of its digits is 768, while the sum is 23.

The square root of 6222821 is about 2494.5582775313. The cubic root of 6222821 is about 183.9341781736.

It can be divided in two parts, 622 and 2821, that added together give a palindrome (3443).

The spelling of 6222821 in words is "six million, two hundred twenty-two thousand, eight hundred twenty-one".