3218 has 4 divisors (see below), whose sum is σ = 4830.
Its totient is φ = 1608.
The previous prime is 3217. The next prime is 3221. The reversal of 3218 is 8123.
3218 is nontrivially palindromic in base 6.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 1849 + 1369 = 43^2 + 37^2
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 7, base 11 and base 14.
It is a nialpdrome in base 8 and base 16.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3218.
It is not an unprimeable number, because it can be changed into a prime (3217) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803 + ... + 806.
3218 is a deficient number, since it is larger than the sum of its proper divisors (1612).
3218 is a wasteful number, since it uses less digits than its factorization.
3218 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1611.
The product of its digits is 48, while the sum is 14.
The square root of 3218 is about 56.7274184147.
The cubic root of 3218 is about 14.7637045854.
It can be divided in two parts, 32 and 18, that multiplied together give a square (576 = 242).
The spelling of 3218 in words is "three thousand, two hundred eighteen".