52365809 has 4 divisors (see below), whose sum is σ = 52765680. Its totient is φ = 51965940.

The previous prime is 52365799. The next prime is 52365823. The reversal of 52365809 is 90856325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52365809 - 2¹⁶ = 52300273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52365109) 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, 199739 + ... + 200000.

It is an arithmetic number, because the mean of its divisors is an integer number (13191420).

Almost surely, 2^52365809 is an apocalyptic number.

It is an amenable number.

52365809 is a deficient number, since it is larger than the sum of its proper divisors (399871).

52365809 is a wasteful number, since it uses less digits than its factorization.

52365809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399870.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 52365809 is about 7236.4223895513. The cubic root of 52365809 is about 374.1243188190.

The spelling of 52365809 in words is "fifty-two million, three hundred sixty-five thousand, eight hundred nine".