65217565 has 16 divisors (see below), whose sum is σ = 89608320. Its totient is φ = 44637120.

The previous prime is 65217563. The next prime is 65217589. The reversal of 65217565 is 56571256.

65217565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65217565 - 2¹ = 65217563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65217563) 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 in 15 ways as a sum of consecutive naturals, for example, 21726 + ... + 24544.

It is an arithmetic number, because the mean of its divisors is an integer number (5600520).

Almost surely, 2^65217565 is an apocalyptic number.

It is an amenable number.

65217565 is a deficient number, since it is larger than the sum of its proper divisors (24390755).

65217565 is a wasteful number, since it uses less digits than its factorization.

65217565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492.

The product of its digits is 63000, while the sum is 37.

The square root of 65217565 is about 8075.7392850438. The cubic root of 65217565 is about 402.5206758665.

The spelling of 65217565 in words is "sixty-five million, two hundred seventeen thousand, five hundred sixty-five".