8248544221 has 2 divisors, whose sum is σ = 8248544222. Its totient is φ = 8248544220.

The previous prime is 8248544219. The next prime is 8248544231. The reversal of 8248544221 is 1224458428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6462552100 + 1785992121 = 80390^2 + 42261^2 .

It is a cyclic number.

It is not a de Polignac number, because 8248544221 - 2¹ = 8248544219 is a prime.

Together with 8248544219, 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 (8248544231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4124272110 + 4124272111.

It is an arithmetic number, because the mean of its divisors is an integer number (4124272111).

Almost surely, 2^8248544221 is an apocalyptic number.

It is an amenable number.

8248544221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8248544221 is an equidigital number, since it uses as much as digits as its factorization.

8248544221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163840, while the sum is 40.

The square root of 8248544221 is about 90821.4964697235. The cubic root of 8248544221 is about 2020.5011517569.

The spelling of 8248544221 in words is "eight billion, two hundred forty-eight million, five hundred forty-four thousand, two hundred twenty-one".