65622217 has 2 divisors, whose sum is σ = 65622218. Its totient is φ = 65622216.

The previous prime is 65622209. The next prime is 65622229. The reversal of 65622217 is 71222656.

65622217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61638201 + 3984016 = 7851^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 65622217 - 2³ = 65622209 is a prime.

It is not a weakly prime, because it can be changed into another prime (65622617) 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, 32811108 + 32811109.

It is an arithmetic number, because the mean of its divisors is an integer number (32811109).

Almost surely, 2^65622217 is an apocalyptic number.

It is an amenable number.

65622217 is a deficient number, since it is larger than the sum of its proper divisors (1).

65622217 is an equidigital number, since it uses as much as digits as its factorization.

65622217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 65622217 is about 8100.7541006995. The cubic root of 65622217 is about 403.3514596199.

The spelling of 65622217 in words is "sixty-five million, six hundred twenty-two thousand, two hundred seventeen".