4218 has 16 divisors (see below), whose sum is σ = 9120. Its totient is φ = 1296.
The previous prime is 4217. The next prime is 4219. The reversal of 4218 is 8124.
It is an interprime number because it is at equal distance from previous prime (4217) and next prime (4219).
It is a plaindrome in base 5.
It is a zygodrome in base 5.
It is a junction number, because it is equal to n+sod(n) for n = 4197 and 4206.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4211) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 132.
It is an arithmetic number, because the mean of its divisors is an integer number (570).
24218 is an apocalyptic number.
4218 is an abundant number, since it is smaller than the sum of its proper divisors (4902).
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 (4560).
4218 is a wasteful number, since it uses less digits than its factorization.
4218 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 61.
The product of its digits is 64, while the sum is 15.
The square root of 4218 is about 64.9461315245. The cubic root of 4218 is about 16.1573025920.
It can be divided in two parts, 4 and 218, that added together give a palindrome (222).
The spelling of 4218 in words is "four thousand, two hundred eighteen".
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