52218 has 16 divisors (see below), whose sum is σ = 116160. Its totient is φ = 17388.

The previous prime is 52201. The next prime is 52223. The reversal of 52218 is 81225.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 52218.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 52218.

It is an unprimeable number.

52218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 430 + ... + 537.

It is an arithmetic number, because the mean of its divisors is an integer number (7260).

2⁵²²¹⁸ is an apocalyptic number.

52218 is an abundant number, since it is smaller than the sum of its proper divisors (63942).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58080).

52218 is a wasteful number, since it uses less digits than its factorization.

52218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 972 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 52218 is about 228.5125817105. The cubic root of 52218 is about 37.3771982988.

The spelling of 52218 in words is "fifty-two thousand, two hundred eighteen".