217230216 has 128 divisors (see below), whose sum is σ = 685946880. Its totient is φ = 55858176.

The previous prime is 217230179. The next prime is 217230217. The reversal of 217230216 is 612032712.

217230216 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×217230216³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (217230217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64035 + ... + 67341.

It is an arithmetic number, because the mean of its divisors is an integer number (5358960).

Almost surely, 2^217230216 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 217230216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342973440).

217230216 is an abundant number, since it is smaller than the sum of its proper divisors (468716664).

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

217230216 is a wasteful number, since it uses less digits than its factorization.

217230216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3359 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 217230216 is about 14738.7318314704. The cubic root of 217230216 is about 601.1369331664.

Adding to 217230216 its reverse (612032712), we get a palindrome (829262928).

The spelling of 217230216 in words is "two hundred seventeen million, two hundred thirty thousand, two hundred sixteen".