65641223 has 2 divisors, whose sum is σ = 65641224. Its totient is φ = 65641222.

The previous prime is 65641159. The next prime is 65641237. The reversal of 65641223 is 32214656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65641223 - 2⁶ = 65641159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65641283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32820611 + 32820612.

It is an arithmetic number, because the mean of its divisors is an integer number (32820612).

Almost surely, 2^65641223 is an apocalyptic number.

65641223 is a deficient number, since it is larger than the sum of its proper divisors (1).

65641223 is an equidigital number, since it uses as much as digits as its factorization.

65641223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 65641223 is about 8101.9271164335. The cubic root of 65641223 is about 403.3903964222.

Adding to 65641223 its reverse (32214656), we get a palindrome (97855879).

The spelling of 65641223 in words is "sixty-five million, six hundred forty-one thousand, two hundred twenty-three".