162243217 has 2 divisors, whose sum is σ = 162243218. Its totient is φ = 162243216.

The previous prime is 162243203. The next prime is 162243233. The reversal of 162243217 is 712342261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142181776 + 20061441 = 11924^2 + 4479^2 .

It is a cyclic number.

It is not a de Polignac number, because 162243217 - 2⁷ = 162243089 is a prime.

It is a super-2 number, since 2×162243217² = 52645722925018178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (162243287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81121608 + 81121609.

It is an arithmetic number, because the mean of its divisors is an integer number (81121609).

Almost surely, 2^162243217 is an apocalyptic number.

It is an amenable number.

162243217 is a deficient number, since it is larger than the sum of its proper divisors (1).

162243217 is an equidigital number, since it uses as much as digits as its factorization.

162243217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 162243217 is about 12737.4729440341. The cubic root of 162243217 is about 545.4088529292.

Adding to 162243217 its reverse (712342261), we get a palindrome (874585478).

The spelling of 162243217 in words is "one hundred sixty-two million, two hundred forty-three thousand, two hundred seventeen".