115218 has 24 divisors (see below), whose sum is σ = 257868. Its totient is φ = 37152.

The previous prime is 115211. The next prime is 115223. The reversal of 115218 is 812511.

It can be written as a sum of positive squares in 2 ways, for example, as 91809 + 23409 = 303^2 + 153^2 .

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 115218.

It is not an unprimeable number, because it can be changed into a prime (115211) by changing a digit.

115218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 580 + ... + 752.

2¹¹⁵²¹⁸ is an apocalyptic number.

115218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128934).

115218 is an abundant number, since it is smaller than the sum of its proper divisors (142650).

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

115218 is a wasteful number, since it uses less digits than its factorization.

115218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

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

The square root of 115218 is about 339.4377704381. The cubic root of 115218 is about 48.6601500834.

Adding to 115218 its reverse (812511), we get a palindrome (927729).

It can be divided in two parts, 1152 and 18, that multiplied together give a 4-th power (20736 = 12⁴).

The spelling of 115218 in words is "one hundred fifteen thousand, two hundred eighteen".