52816565 has 4 divisors (see below), whose sum is σ = 63379884. Its totient is φ = 42253248.

The previous prime is 52816553. The next prime is 52816571. The reversal of 52816565 is 56561825.

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 23990404 + 28826161 = 4898^2 + 5369^2 .

It is a cyclic number.

It is not a de Polignac number, because 52816565 - 2⁴ = 52816549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5281652 + ... + 5281661.

It is an arithmetic number, because the mean of its divisors is an integer number (15844971).

Almost surely, 2^52816565 is an apocalyptic number.

It is an amenable number.

52816565 is a deficient number, since it is larger than the sum of its proper divisors (10563319).

52816565 is a wasteful number, since it uses less digits than its factorization.

52816565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10563318.

The product of its digits is 72000, while the sum is 38.

The square root of 52816565 is about 7267.5006019952. The cubic root of 52816565 is about 375.1947196146.

The spelling of 52816565 in words is "fifty-two million, eight hundred sixteen thousand, five hundred sixty-five".