8428221341 has 2 divisors, whose sum is σ = 8428221342. Its totient is φ = 8428221340.

The previous prime is 8428221323. The next prime is 8428221371. The reversal of 8428221341 is 1431228248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4636248100 + 3791973241 = 68090^2 + 61579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8428221341 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8428221311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214110670 + 4214110671.

It is an arithmetic number, because the mean of its divisors is an integer number (4214110671).

Almost surely, 2^8428221341 is an apocalyptic number.

It is an amenable number.

8428221341 is a deficient number, since it is larger than the sum of its proper divisors (1).

8428221341 is an equidigital number, since it uses as much as digits as its factorization.

8428221341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 35.

The square root of 8428221341 is about 91805.3448389580. The cubic root of 8428221341 is about 2035.0666822702.

Adding to 8428221341 its reverse (1431228248), we get a palindrome (9859449589).

The spelling of 8428221341 in words is "eight billion, four hundred twenty-eight million, two hundred twenty-one thousand, three hundred forty-one".