6816222 has 48 divisors (see below), whose sum is σ = 17252352. Its totient is φ = 1904400.

The previous prime is 6816179. The next prime is 6816233. The reversal of 6816222 is 2226186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5347 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (359424).

Almost surely, 2^6816222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6816222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8626176).

6816222 is an abundant number, since it is smaller than the sum of its proper divisors (10436130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6816222 is a wasteful number, since it uses less digits than its factorization.

6816222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1210 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 6816222 is about 2610.7895357535. The cubic root of 6816222 is about 189.6041805947.

It can be divided in two parts, 681 and 6222, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 6816222 in words is "six million, eight hundred sixteen thousand, two hundred twenty-two".