8116565 has 24 divisors (see below), whose sum is σ = 10676232. Its totient is φ = 5918720.

The previous prime is 8116561. The next prime is 8116567. The reversal of 8116565 is 5656118.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1267876 + 6848689 = 1126^2 + 2617^2 .

It is not a de Polignac number, because 8116565 - 2² = 8116561 is a prime.

It is a Duffinian number.

Its product of digits (7200) is a multiple of the sum of its prime divisors (200).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8116561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59177 + ... + 59313.

It is an arithmetic number, because the mean of its divisors is an integer number (444843).

Almost surely, 2^8116565 is an apocalyptic number.

8116565 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8116565 is a deficient number, since it is larger than the sum of its proper divisors (2559667).

8116565 is a wasteful number, since it uses less digits than its factorization.

8116565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 200 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 8116565 is about 2848.9585816575. The cubic root of 8116565 is about 200.9666949760.

It can be divided in two parts, 81165 and 65, that multiplied together give a palindrome (5275725).

The spelling of 8116565 in words is "eight million, one hundred sixteen thousand, five hundred sixty-five".