216297 has 8 divisors (see below), whose sum is σ = 320480. Its totient is φ = 144180.

The previous prime is 216289. The next prime is 216317. The reversal of 216297 is 792612.

It is not a de Polignac number, because 216297 - 2³ = 216289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8011 = 216297 / (2 + 1 + 6 + 2 + 9 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216297.

It is not an unprimeable number, because it can be changed into a prime (216217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3979 + ... + 4032.

It is an arithmetic number, because the mean of its divisors is an integer number (40060).

2²¹⁶²⁹⁷ is an apocalyptic number.

216297 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

216297 is a deficient number, since it is larger than the sum of its proper divisors (104183).

216297 is an equidigital number, since it uses as much as digits as its factorization.

216297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8020 (or 8014 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 216297 is about 465.0774129110. The cubic root of 216297 is about 60.0274874055.

The spelling of 216297 in words is "two hundred sixteen thousand, two hundred ninety-seven".