8347221513 has 6 divisors (see below), whose sum is σ = 12057097754. Its totient is φ = 5564814336.

The previous prime is 8347221511. The next prime is 8347221539. The reversal of 8347221513 is 3151227438.

8347221513 is a `hidden beast` number, since 83 + 47 + 2 + 21 + 513 = 666.

8347221513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7991823609 + 355397904 = 89397^2 + 18852^2 .

It is not a de Polignac number, because 8347221513 - 2¹ = 8347221511 is a prime.

It is a super-2 number, since 2×8347221513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8347221511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463734520 + ... + 463734537.

Almost surely, 2^8347221513 is an apocalyptic number.

It is an amenable number.

8347221513 is a deficient number, since it is larger than the sum of its proper divisors (3709876241).

8347221513 is a wasteful number, since it uses less digits than its factorization.

8347221513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927469063 (or 927469060 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 8347221513 is about 91363.1299431012. The cubic root of 8347221513 is about 2028.5263162805.

The spelling of 8347221513 in words is "eight billion, three hundred forty-seven million, two hundred twenty-one thousand, five hundred thirteen".