65070221 has 2 divisors, whose sum is σ = 65070222. Its totient is φ = 65070220.

The previous prime is 65070217. The next prime is 65070233. The reversal of 65070221 is 12207056.

65070221 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., 56040196 + 9030025 = 7486^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 65070221 - 2² = 65070217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65070211) 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, 32535110 + 32535111.

It is an arithmetic number, because the mean of its divisors is an integer number (32535111).

Almost surely, 2^65070221 is an apocalyptic number.

It is an amenable number.

65070221 is a deficient number, since it is larger than the sum of its proper divisors (1).

65070221 is an equidigital number, since it uses as much as digits as its factorization.

65070221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 65070221 is about 8066.6114943017. The cubic root of 65070221 is about 402.2173131778.

Adding to 65070221 its reverse (12207056), we get a palindrome (77277277).

The spelling of 65070221 in words is "sixty-five million, seventy thousand, two hundred twenty-one".