65515 has 4 divisors (see below), whose sum is σ = 78624. Its totient is φ = 52408.

The previous prime is 65497. The next prime is 65519. The reversal of 65515 is 51556.

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

It is a cyclic number.

It is not a de Polignac number, because 65515 - 2⁹ = 65003 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (65519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6547 + ... + 6556.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2⁶⁵⁵¹⁵ is an apocalyptic number.

65515 is a deficient number, since it is larger than the sum of its proper divisors (13109).

65515 is a wasteful number, since it uses less digits than its factorization.

65515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108.

The product of its digits is 750, while the sum is 22.

The square root of 65515 is about 255.9589810888. The cubic root of 65515 is about 40.3131667658.

It can be divided in two parts, 6551 and 5, that added together give a palindrome (6556).

The spelling of 65515 in words is "sixty-five thousand, five hundred fifteen".