8120218 has 4 divisors (see below), whose sum is σ = 12180330. Its totient is φ = 4060108.

The previous prime is 8120213. The next prime is 8120243.

8120218 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 6385729 + 1734489 = 2527^2 + 1317^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8120213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030053 + ... + 2030056.

Almost surely, 2^8120218 is an apocalyptic number.

8120218 is a deficient number, since it is larger than the sum of its proper divisors (4060112).

8120218 is a wasteful number, since it uses less digits than its factorization.

8120218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060111.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 8120218 is about 2849.5996209994. The cubic root of 8120218 is about 200.9968399625.

It can be divided in two parts, 8120 and 218, that added together give a palindrome (8338).

The spelling of 8120218 in words is "eight million, one hundred twenty thousand, two hundred eighteen".