65217563 has 2 divisors, whose sum is σ = 65217564. Its totient is φ = 65217562.

The previous prime is 65217553. The next prime is 65217589. The reversal of 65217563 is 36571256.

65217563 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 is a cyclic number.

It is not a de Polignac number, because 65217563 - 2⁸ = 65217307 is a prime.

It is not a weakly prime, because it can be changed into another prime (65217533) 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, 32608781 + 32608782.

It is an arithmetic number, because the mean of its divisors is an integer number (32608782).

Almost surely, 2^65217563 is an apocalyptic number.

65217563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65217563 is an equidigital number, since it uses as much as digits as its factorization.

65217563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 35.

The square root of 65217563 is about 8075.7391612161. The cubic root of 65217563 is about 402.5206717519.

The spelling of 65217563 in words is "sixty-five million, two hundred seventeen thousand, five hundred sixty-three".