210216 has 32 divisors (see below), whose sum is σ = 554400. Its totient is φ = 66240.

The previous prime is 210209. The next prime is 210229. The reversal of 210216 is 612012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210216.

It is an unprimeable number.

210216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (17325).

2²¹⁰²¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277200).

210216 is an abundant number, since it is smaller than the sum of its proper divisors (344184).

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

210216 is a wasteful number, since it uses less digits than its factorization.

210216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 210216 is about 458.4931842460. The cubic root of 210216 is about 59.4595917055.

Adding to 210216 its reverse (612012), we get a palindrome (822228).

The spelling of 210216 in words is "two hundred ten thousand, two hundred sixteen".