163563 has 4 divisors (see below), whose sum is σ = 218088. Its totient is φ = 109040.

The previous prime is 163561. The next prime is 163567. The reversal of 163563 is 365361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365361 = 3 ⋅121787.

It is a cyclic number.

It is not a de Polignac number, because 163563 - 2¹ = 163561 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 163563.

It is not an unprimeable number, because it can be changed into a prime (163561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27258 + ... + 27263.

It is an arithmetic number, because the mean of its divisors is an integer number (54522).

2¹⁶³⁵⁶³ is an apocalyptic number.

163563 is a deficient number, since it is larger than the sum of its proper divisors (54525).

163563 is an equidigital number, since it uses as much as digits as its factorization.

163563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54524.

The product of its digits is 1620, while the sum is 24.

The square root of 163563 is about 404.4292274305. The cubic root of 163563 is about 54.6883754418.

The spelling of 163563 in words is "one hundred sixty-three thousand, five hundred sixty-three".