8182221 has 4 divisors (see below), whose sum is σ = 10909632. Its totient is φ = 5454812.

The previous prime is 8182211. The next prime is 8182243. The reversal of 8182221 is 1222818.

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 a cyclic number.

It is not a de Polignac number, because 8182221 - 2⁶ = 8182157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8182191 and 8182200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8182201) 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, 1363701 + ... + 1363706.

It is an arithmetic number, because the mean of its divisors is an integer number (2727408).

Almost surely, 2^8182221 is an apocalyptic number.

It is an amenable number.

8182221 is a deficient number, since it is larger than the sum of its proper divisors (2727411).

8182221 is a wasteful number, since it uses less digits than its factorization.

8182221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727410.

The product of its digits is 512, while the sum is 24.

The square root of 8182221 is about 2860.4581800823. The cubic root of 8182221 is about 201.5071227114.

The spelling of 8182221 in words is "eight million, one hundred eighty-two thousand, two hundred twenty-one".