8683221517 has 4 divisors (see below), whose sum is σ = 8683407900. Its totient is φ = 8683035136.

The previous prime is 8683221509. The next prime is 8683221527. The reversal of 8683221517 is 7151223868.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4160121001 + 4523100516 = 64499^2 + 67254^2 .

It is a cyclic number.

It is not a de Polignac number, because 8683221517 - 2³ = 8683221509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8683221527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44859 + ... + 139207.

It is an arithmetic number, because the mean of its divisors is an integer number (2170851975).

Almost surely, 2^8683221517 is an apocalyptic number.

It is an amenable number.

8683221517 is a deficient number, since it is larger than the sum of its proper divisors (186383).

8683221517 is an equidigital number, since it uses as much as digits as its factorization.

8683221517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186382.

The product of its digits is 161280, while the sum is 43.

The square root of 8683221517 is about 93183.8050146054. The cubic root of 8683221517 is about 2055.3871015154.

The spelling of 8683221517 in words is "eight billion, six hundred eighty-three million, two hundred twenty-one thousand, five hundred seventeen".