151218 has 24 divisors (see below), whose sum is σ = 339456. Its totient is φ = 48600.

The previous prime is 151213. The next prime is 151237. The reversal of 151218 is 812151.

151218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 151218.

It is not an unprimeable number, because it can be changed into a prime (151213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (14144).

2¹⁵¹²¹⁸ is an apocalyptic number.

151218 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 151218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169728).

151218 is an abundant number, since it is smaller than the sum of its proper divisors (188238).

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

151218 is a wasteful number, since it uses less digits than its factorization.

151218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 307 counting only the distinct ones).

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

The square root of 151218 is about 388.8675867182. The cubic root of 151218 is about 53.2763540778.

Adding to 151218 its reverse (812151), we get a palindrome (963369).

It can be divided in two parts, 15121 and 8, that added together give a square (15129 = 123²).

The spelling of 151218 in words is "one hundred fifty-one thousand, two hundred eighteen".