1328223217 has 2 divisors, whose sum is σ = 1328223218. Its totient is φ = 1328223216.

The previous prime is 1328223181. The next prime is 1328223271. The reversal of 1328223217 is 7123228231.

Together with next prime (1328223271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1328165136 + 58081 = 36444^2 + 241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328223217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328223317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664111608 + 664111609.

It is an arithmetic number, because the mean of its divisors is an integer number (664111609).

Almost surely, 2^1328223217 is an apocalyptic number.

It is an amenable number.

1328223217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328223217 is an equidigital number, since it uses as much as digits as its factorization.

1328223217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 1328223217 is about 36444.7968439941. The cubic root of 1328223217 is about 1099.2345134294.

The spelling of 1328223217 in words is "one billion, three hundred twenty-eight million, two hundred twenty-three thousand, two hundred seventeen".