8148221 has 2 divisors, whose sum is σ = 8148222. Its totient is φ = 8148220.

The previous prime is 8148211. The next prime is 8148229. The reversal of 8148221 is 1228418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 1125721 = 2650^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 8148221 - 2¹⁸ = 7886077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8148229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4074110 + 4074111.

It is an arithmetic number, because the mean of its divisors is an integer number (4074111).

Almost surely, 2^8148221 is an apocalyptic number.

It is an amenable number.

8148221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8148221 is an equidigital number, since it uses as much as digits as its factorization.

8148221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 8148221 is about 2854.5088894589. The cubic root of 8148221 is about 201.2276242756.

The spelling of 8148221 in words is "eight million, one hundred forty-eight thousand, two hundred twenty-one".