83218 has 4 divisors (see below), whose sum is σ = 124830. Its totient is φ = 41608.

The previous prime is 83207. The next prime is 83219. The reversal of 83218 is 81238.

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., 49729 + 33489 = 223^2 + 183^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (83219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20803 + ... + 20806.

2⁸³²¹⁸ is an apocalyptic number.

83218 is a deficient number, since it is larger than the sum of its proper divisors (41612).

83218 is a wasteful number, since it uses less digits than its factorization.

83218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41611.

The product of its digits is 384, while the sum is 22.

The square root of 83218 is about 288.4753022357. The cubic root of 83218 is about 43.6588633441.

The spelling of 83218 in words is "eighty-three thousand, two hundred eighteen".