216168 has 16 divisors (see below), whose sum is σ = 540480. Its totient is φ = 72048.

The previous prime is 216157. The next prime is 216173. The reversal of 216168 is 861612.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 9007 = 216168 / (2 + 1 + 6 + 1 + 6 + 8).

It is a nude number because it is divisible by every one of its digits.

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, 4480 + ... + 4527.

It is an arithmetic number, because the mean of its divisors is an integer number (33780).

2²¹⁶¹⁶⁸ is an apocalyptic number.

It is an amenable number.

216168 is an abundant number, since it is smaller than the sum of its proper divisors (324312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216168 is a wasteful number, since it uses less digits than its factorization.

216168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016 (or 9012 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 216168 is about 464.9387056376. The cubic root of 216168 is about 60.0155515244.

The spelling of 216168 in words is "two hundred sixteen thousand, one hundred sixty-eight".