7218885 has 16 divisors (see below), whose sum is σ = 11863296. Its totient is φ = 3745728.

The previous prime is 7218859. The next prime is 7218889. The reversal of 7218885 is 5888127.

It is not a de Polignac number, because 7218885 - 2⁵ = 7218853 is a prime.

It is a super-2 number, since 2×7218885² = 104224601286450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5949 + ... + 7058.

It is an arithmetic number, because the mean of its divisors is an integer number (741456).

Almost surely, 2^7218885 is an apocalyptic number.

It is an amenable number.

7218885 is a deficient number, since it is larger than the sum of its proper divisors (4644411).

7218885 is a wasteful number, since it uses less digits than its factorization.

7218885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13052.

The product of its digits is 35840, while the sum is 39.

The square root of 7218885 is about 2686.7982804818. The cubic root of 7218885 is about 193.2665560764.

The spelling of 7218885 in words is "seven million, two hundred eighteen thousand, eight hundred eighty-five".