73218 has 8 divisors (see below), whose sum is σ = 146448. Its totient is φ = 24404.

The previous prime is 73189. The next prime is 73237. The reversal of 73218 is 81237.

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

73218 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73194 and 73203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096 + ... + 6107.

It is an arithmetic number, because the mean of its divisors is an integer number (18306).

2⁷³²¹⁸ is an apocalyptic number.

73218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (73224).

73218 is a wasteful number, since it uses less digits than its factorization.

73218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12208.

The product of its digits is 336, while the sum is 21.

The square root of 73218 is about 270.5882480818. The cubic root of 73218 is about 41.8349531744.

The spelling of 73218 in words is "seventy-three thousand, two hundred eighteen".