8821247217 has 16 divisors (see below), whose sum is σ = 12014956800. Its totient is φ = 5754248192.

The previous prime is 8821247213. The next prime is 8821247243. The reversal of 8821247217 is 7127421288.

It is a cyclic number.

It is not a de Polignac number, because 8821247217 - 2² = 8821247213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8821247213) 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, 1031953 + ... + 1040465.

It is an arithmetic number, because the mean of its divisors is an integer number (750934800).

Almost surely, 2^8821247217 is an apocalyptic number.

It is an amenable number.

8821247217 is a deficient number, since it is larger than the sum of its proper divisors (3193709583).

8821247217 is a wasteful number, since it uses less digits than its factorization.

8821247217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15912.

The product of its digits is 100352, while the sum is 42.

The square root of 8821247217 is about 93921.4949678720. The cubic root of 8821247217 is about 2066.2204923599.

The spelling of 8821247217 in words is "eight billion, eight hundred twenty-one million, two hundred forty-seven thousand, two hundred seventeen".