8138228317 has 8 divisors (see below), whose sum is σ = 8230848696. Its totient is φ = 8045786112.

The previous prime is 8138228297. The next prime is 8138228323. The reversal of 8138228317 is 7138228318.

It can be written as a sum of positive squares in 4 ways, for example, as 1529513881 + 6608714436 = 39109^2 + 81294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8138228317 - 2¹¹ = 8138226269 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 (8138220317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48423 + ... + 136459.

It is an arithmetic number, because the mean of its divisors is an integer number (1028856087).

Almost surely, 2^8138228317 is an apocalyptic number.

It is an amenable number.

8138228317 is a deficient number, since it is larger than the sum of its proper divisors (92620379).

8138228317 is an equidigital number, since it uses as much as digits as its factorization.

8138228317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89087.

The product of its digits is 129024, while the sum is 43.

The square root of 8138228317 is about 90212.1295447569. The cubic root of 8138228317 is about 2011.4533120361.

Subtracting from 8138228317 its reverse (7138228318), we obtain a palindrome (999999999).

The spelling of 8138228317 in words is "eight billion, one hundred thirty-eight million, two hundred twenty-eight thousand, three hundred seventeen".