8220111 has 4 divisors (see below), whose sum is σ = 10960152. Its totient is φ = 5480072.

The previous prime is 8220109. The next prime is 8220139. The reversal of 8220111 is 1110228.

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 8220111 - 2¹ = 8220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220101) 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, 1370016 + ... + 1370021.

It is an arithmetic number, because the mean of its divisors is an integer number (2740038).

Almost surely, 2^8220111 is an apocalyptic number.

8220111 is a deficient number, since it is larger than the sum of its proper divisors (2740041).

8220111 is a wasteful number, since it uses less digits than its factorization.

8220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740040.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 8220111 is about 2867.0735951489. The cubic root of 8220111 is about 201.8176883321.

Adding to 8220111 its reverse (1110228), we get a palindrome (9330339).

The spelling of 8220111 in words is "eight million, two hundred twenty thousand, one hundred eleven".