50565 has 8 divisors (see below), whose sum is σ = 80928. Its totient is φ = 26960.

The previous prime is 50551. The next prime is 50581. The reversal of 50565 is 56505.

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

It is not a de Polignac number, because 50565 - 2⁴ = 50549 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (10116).

2⁵⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

50565 is a deficient number, since it is larger than the sum of its proper divisors (30363).

50565 is a wasteful number, since it uses less digits than its factorization.

50565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 50565 is about 224.8666271371. The cubic root of 50565 is about 36.9785607474.

Adding to 50565 its product of nonzero digits (750), we get a palindrome (51315).

The spelling of 50565 in words is "fifty thousand, five hundred sixty-five".