6815223 has 6 divisors (see below), whose sum is σ = 9844224. Its totient is φ = 4543476.

The previous prime is 6815161. The next prime is 6815227. The reversal of 6815223 is 3225186.

It is not a de Polignac number, because 6815223 - 2¹² = 6811127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378615 + ... + 378632.

It is an arithmetic number, because the mean of its divisors is an integer number (1640704).

Almost surely, 2^6815223 is an apocalyptic number.

6815223 is a deficient number, since it is larger than the sum of its proper divisors (3029001).

6815223 is a wasteful number, since it uses less digits than its factorization.

6815223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757253 (or 757250 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 6815223 is about 2610.5982073080. The cubic root of 6815223 is about 189.5949172114.

The spelling of 6815223 in words is "six million, eight hundred fifteen thousand, two hundred twenty-three".