2143218 has 32 divisors (see below), whose sum is σ = 5345280. Its totient is φ = 556560.

The previous prime is 2143217. The next prime is 2143223. The reversal of 2143218 is 8123412.

2143218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2143194 and 2143203.

It is not an unprimeable number, because it can be changed into a prime (2143217) 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, 1858 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (167040).

2^2143218 is an apocalyptic number.

2143218 is an abundant number, since it is smaller than the sum of its proper divisors (3202062).

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

2143218 is a wasteful number, since it uses less digits than its factorization.

2143218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662.

The product of its digits is 384, while the sum is 21.

The square root of 2143218 is about 1463.9733604134. The cubic root of 2143218 is about 128.9304354216.

The spelling of 2143218 in words is "two million, one hundred forty-three thousand, two hundred eighteen".