216075 has 24 divisors (see below), whose sum is σ = 371008. Its totient is φ = 110880.

The previous prime is 216071. The next prime is 216091. The reversal of 216075 is 570612.

It is not a de Polignac number, because 216075 - 2² = 216071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3192 + ... + 3258.

216075 is a Friedman number, since it can be written as 75+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁷⁵ is an apocalyptic number.

216075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216075 is a deficient number, since it is larger than the sum of its proper divisors (154933).

216075 is a wasteful number, since it uses less digits than its factorization.

216075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 216075 is about 464.8386816951. The cubic root of 216075 is about 60.0069436408.

Adding to 216075 its reverse (570612), we get a palindrome (786687).

It can be divided in two parts, 21607 and 5, that added together give a palindrome (21612).

The spelling of 216075 in words is "two hundred sixteen thousand, seventy-five".