8228191 has 2 divisors, whose sum is σ = 8228192. Its totient is φ = 8228190.

The previous prime is 8228189. The next prime is 8228201. The reversal of 8228191 is 1918228.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8228191 - 2¹ = 8228189 is a prime.

Together with 8228189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8228111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4114095 + 4114096.

It is an arithmetic number, because the mean of its divisors is an integer number (4114096).

Almost surely, 2^8228191 is an apocalyptic number.

8228191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8228191 is an equidigital number, since it uses as much as digits as its factorization.

8228191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 31.

The square root of 8228191 is about 2868.4823513489. The cubic root of 8228191 is about 201.8837925861.

The spelling of 8228191 in words is "eight million, two hundred twenty-eight thousand, one hundred ninety-one".