65513165 has 4 divisors (see below), whose sum is σ = 78615804. Its totient is φ = 52410528.

The previous prime is 65513113. The next prime is 65513213. The reversal of 65513165 is 56131556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27604516 + 37908649 = 5254^2 + 6157^2 .

It is a cyclic number.

It is not a de Polignac number, because 65513165 - 2¹² = 65509069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6551312 + ... + 6551321.

It is an arithmetic number, because the mean of its divisors is an integer number (19653951).

Almost surely, 2^65513165 is an apocalyptic number.

It is an amenable number.

65513165 is a deficient number, since it is larger than the sum of its proper divisors (13102639).

65513165 is a wasteful number, since it uses less digits than its factorization.

65513165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13102638.

The product of its digits is 13500, while the sum is 32.

The square root of 65513165 is about 8094.0203236710. The cubic root of 65513165 is about 403.1279038711.

The spelling of 65513165 in words is "sixty-five million, five hundred thirteen thousand, one hundred sixty-five".