71218 has 8 divisors (see below), whose sum is σ = 122112. Its totient is φ = 30516.

The previous prime is 71209. The next prime is 71233. The reversal of 71218 is 81217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 71195 and 71204.

It is an unprimeable number.

71218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2530 + ... + 2557.

It is an arithmetic number, because the mean of its divisors is an integer number (15264).

2⁷¹²¹⁸ is an apocalyptic number.

71218 is a deficient number, since it is larger than the sum of its proper divisors (50894).

71218 is a wasteful number, since it uses less digits than its factorization.

71218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096.

The product of its digits is 112, while the sum is 19.

The square root of 71218 is about 266.8670080771. The cubic root of 71218 is about 41.4505143935.

Subtracting 71218 from its reverse (81217), we obtain a palindrome (9999).

It can be divided in two parts, 71 and 218, that added together give a square (289 = 17²).

The spelling of 71218 in words is "seventy-one thousand, two hundred eighteen".