53565 has 8 divisors (see below), whose sum is σ = 85728. Its totient is φ = 28560.

The previous prime is 53551. The next prime is 53569. The reversal of 53565 is 56535.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53565 - 2⁴ = 53549 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (10716).

2⁵³⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

53565 is a deficient number, since it is larger than the sum of its proper divisors (32163).

53565 is a wasteful number, since it uses less digits than its factorization.

53565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579.

The product of its digits is 2250, while the sum is 24.

The square root of 53565 is about 231.4411372250. The cubic root of 53565 is about 37.6958641013.

Subtracting from 53565 its product of digits (2250), we obtain a palindrome (51315).

It can be divided in two parts, 5 and 3565, that added together give a triangular number (3570 = T₈₄).

The spelling of 53565 in words is "fifty-three thousand, five hundred sixty-five".