8108221 has 4 divisors (see below), whose sum is σ = 8845344. Its totient is φ = 7371100.

The previous prime is 8108207. The next prime is 8108237. The reversal of 8108221 is 1228018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8108221 - 2¹¹ = 8106173 is a prime.

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 a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8108192 and 8108201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8108921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368545 + ... + 368566.

It is an arithmetic number, because the mean of its divisors is an integer number (2211336).

Almost surely, 2^8108221 is an apocalyptic number.

It is an amenable number.

8108221 is a deficient number, since it is larger than the sum of its proper divisors (737123).

8108221 is a wasteful number, since it uses less digits than its factorization.

8108221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737122.

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

The square root of 8108221 is about 2847.4938103532. The cubic root of 8108221 is about 200.8978053636.

The spelling of 8108221 in words is "eight million, one hundred eight thousand, two hundred twenty-one".