7218365 has 16 divisors (see below), whose sum is σ = 10800000. Its totient is φ = 4499520.

The previous prime is 7218349. The next prime is 7218371. The reversal of 7218365 is 5638127.

It is a happy number.

It is not a de Polignac number, because 7218365 - 2⁴ = 7218349 is a prime.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8990 + ... + 9759.

It is an arithmetic number, because the mean of its divisors is an integer number (675000).

Almost surely, 2^7218365 is an apocalyptic number.

It is an amenable number.

7218365 is a deficient number, since it is larger than the sum of its proper divisors (3581635).

7218365 is a wasteful number, since it uses less digits than its factorization.

7218365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772.

The product of its digits is 10080, while the sum is 32.

The square root of 7218365 is about 2686.7015092861. The cubic root of 7218365 is about 193.2619154233.

The spelling of 7218365 in words is "seven million, two hundred eighteen thousand, three hundred sixty-five".