8217219 has 16 divisors (see below), whose sum is σ = 11342240. Its totient is φ = 5287680.

The previous prime is 8217203. The next prime is 8217221. The reversal of 8217219 is 9127128.

8217219 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8217219 - 2⁴ = 8217203 is a prime.

It is a super-2 number, since 2×8217219² = 135045376187922, which contains 22 as substring.

It is a Duffinian number.

8217219 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8217229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19887 + ... + 20295.

It is an arithmetic number, because the mean of its divisors is an integer number (708890).

Almost surely, 2^8217219 is an apocalyptic number.

8217219 is a deficient number, since it is larger than the sum of its proper divisors (3125021).

8217219 is a wasteful number, since it uses less digits than its factorization.

8217219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its digits is 2016, while the sum is 30.

The square root of 8217219 is about 2866.5692037696. The cubic root of 8217219 is about 201.7940177184.

Subtracting 8217219 from its reverse (9127128), we obtain a palindrome (909909).

The spelling of 8217219 in words is "eight million, two hundred seventeen thousand, two hundred nineteen".