6997218 has 32 divisors (see below), whose sum is σ = 14726976. Its totient is φ = 2213568.

The previous prime is 6997213. The next prime is 6997229. The reversal of 6997218 is 8127996.

It is a super-2 number, since 2×6997218² = 97922119479048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6997218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997213) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 9180 + ... + 9912.

It is an arithmetic number, because the mean of its divisors is an integer number (460218).

Almost surely, 2^6997218 is an apocalyptic number.

6997218 is an abundant number, since it is smaller than the sum of its proper divisors (7729758).

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

6997218 is a wasteful number, since it uses less digits than its factorization.

6997218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 54432, while the sum is 42.

The square root of 6997218 is about 2645.2255102354. The cubic root of 6997218 is about 191.2677731357.

The spelling of 6997218 in words is "six million, nine hundred ninety-seven thousand, two hundred eighteen".