8028218321 has 2 divisors, whose sum is σ = 8028218322. Its totient is φ = 8028218320.

The previous prime is 8028218281. The next prime is 8028218347. The reversal of 8028218321 is 1238128208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7502158225 + 526060096 = 86615^2 + 22936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8028218321 is a prime.

It is not a weakly prime, because it can be changed into another prime (8028218381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4014109160 + 4014109161.

It is an arithmetic number, because the mean of its divisors is an integer number (4014109161).

Almost surely, 2^8028218321 is an apocalyptic number.

It is an amenable number.

8028218321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8028218321 is an equidigital number, since it uses as much as digits as its factorization.

8028218321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 8028218321 is about 89600.3254514179. The cubic root of 8028218321 is about 2002.3487673163.

The spelling of 8028218321 in words is "eight billion, twenty-eight million, two hundred eighteen thousand, three hundred twenty-one".