7218243 has 6 divisors (see below), whose sum is σ = 10426364. Its totient is φ = 4812156.

The previous prime is 7218227. The next prime is 7218247. The reversal of 7218243 is 3428127.

It is not a de Polignac number, because 7218243 - 2⁴ = 7218227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401005 + ... + 401022.

Almost surely, 2^7218243 is an apocalyptic number.

7218243 is a deficient number, since it is larger than the sum of its proper divisors (3208121).

7218243 is a wasteful number, since it uses less digits than its factorization.

7218243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802033 (or 802030 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 7218243 is about 2686.6788047699. The cubic root of 7218243 is about 193.2608266225.

The spelling of 7218243 in words is "seven million, two hundred eighteen thousand, two hundred forty-three".