215118 has 48 divisors (see below), whose sum is σ = 533520. Its totient is φ = 62208.

The previous prime is 215087. The next prime is 215123. The reversal of 215118 is 811512.

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 215118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5796 + ... + 5832.

It is an arithmetic number, because the mean of its divisors is an integer number (11115).

2²¹⁵¹¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266760).

215118 is an abundant number, since it is smaller than the sum of its proper divisors (318402).

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

215118 is a wasteful number, since it uses less digits than its factorization.

215118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 78 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 215118 is about 463.8081499931. The cubic root of 215118 is about 59.9182219231.

It can be divided in two parts, 215 and 118, that added together give a palindrome (333).

The spelling of 215118 in words is "two hundred fifteen thousand, one hundred eighteen".