8120219 has 4 divisors (see below), whose sum is σ = 8473296. Its totient is φ = 7767144.

The previous prime is 8120213. The next prime is 8120243. The reversal of 8120219 is 9120218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9120218 = 2 ⋅4560109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120219 is a prime.

It is a super-2 number, since 2×8120219² = 131875913215922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 353053 = 8120219 / (8 + 1 + 2 + 0 + 2 + 1 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8120194 and 8120203.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176504 + ... + 176549.

It is an arithmetic number, because the mean of its divisors is an integer number (2118324).

Almost surely, 2^8120219 is an apocalyptic number.

8120219 is a deficient number, since it is larger than the sum of its proper divisors (353077).

8120219 is a wasteful number, since it uses less digits than its factorization.

8120219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353076.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8120219 is about 2849.5997964627. The cubic root of 8120219 is about 200.9968482134.

Subtracting 8120219 from its reverse (9120218), we obtain a palindrome (999999).

The spelling of 8120219 in words is "eight million, one hundred twenty thousand, two hundred nineteen".