7218843 has 8 divisors (see below), whose sum is σ = 9637968. Its totient is φ = 4806144.

The previous prime is 7218839. The next prime is 7218853. The reversal of 7218843 is 3488127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7218843 - 2² = 7218839 is a prime.

It is a super-2 number, since 2×7218843² = 104223388517298, which contains 22 as substring.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (7218853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571 + ... + 4587.

It is an arithmetic number, because the mean of its divisors is an integer number (1204746).

Almost surely, 2^7218843 is an apocalyptic number.

7218843 is a deficient number, since it is larger than the sum of its proper divisors (2419125).

7218843 is a wasteful number, since it uses less digits than its factorization.

7218843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its digits is 10752, while the sum is 33.

The square root of 7218843 is about 2686.7904644762. The cubic root of 7218843 is about 193.2661812627.

It can be divided in two parts, 72 and 18843, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 7218843 in words is "seven million, two hundred eighteen thousand, eight hundred forty-three".