6820222 has 4 divisors (see below), whose sum is σ = 10230336. Its totient is φ = 3410110.

The previous prime is 6820211. The next prime is 6820241. The reversal of 6820222 is 2220286.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6820193 and 6820202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705054 + ... + 1705057.

It is an arithmetic number, because the mean of its divisors is an integer number (2557584).

Almost surely, 2^6820222 is an apocalyptic number.

6820222 is a deficient number, since it is larger than the sum of its proper divisors (3410114).

6820222 is a wasteful number, since it uses less digits than its factorization.

6820222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410113.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 6820222 is about 2611.5554751910. Note that the first 3 decimals coincide. The cubic root of 6820222 is about 189.6412621537.

The spelling of 6820222 in words is "six million, eight hundred twenty thousand, two hundred twenty-two".