216270 has 48 divisors (see below), whose sum is σ = 589680. Its totient is φ = 57024.

The previous prime is 216263. The next prime is 216289. The reversal of 216270 is 72612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2386 + ... + 2474.

It is an arithmetic number, because the mean of its divisors is an integer number (12285).

2²¹⁶²⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294840).

216270 is an abundant number, since it is smaller than the sum of its proper divisors (373410).

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

216270 is an equidigital number, since it uses as much as digits as its factorization.

216270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 216270 is about 465.0483845795. The cubic root of 216270 is about 60.0249895906.

Adding to 216270 its reverse (72612), we get a palindrome (288882).

The spelling of 216270 in words is "two hundred sixteen thousand, two hundred seventy".