8218147 has 4 divisors (see below), whose sum is σ = 9392176. Its totient is φ = 7044120.

The previous prime is 8218141. The next prime is 8218187. The reversal of 8218147 is 7418128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8218147 - 2³ = 8218139 is a prime.

It is a super-2 number, since 2×8218147² = 135075880227218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8218141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587004 + ... + 587017.

It is an arithmetic number, because the mean of its divisors is an integer number (2348044).

Almost surely, 2^8218147 is an apocalyptic number.

8218147 is a deficient number, since it is larger than the sum of its proper divisors (1174029).

8218147 is a wasteful number, since it uses less digits than its factorization.

8218147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174028.

The product of its digits is 3584, while the sum is 31.

The square root of 8218147 is about 2866.7310651681. The cubic root of 8218147 is about 201.8016138731.

It can be divided in two parts, 82181 and 47, that added together give a palindrome (82228).

The spelling of 8218147 in words is "eight million, two hundred eighteen thousand, one hundred forty-seven".