111563 has 4 divisors (see below), whose sum is σ = 115440. Its totient is φ = 107688.

The previous prime is 111539. The next prime is 111577. The reversal of 111563 is 365111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365111 = 233 ⋅1567.

It is a cyclic number.

It is not a de Polignac number, because 111563 - 2¹² = 107467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895 + ... + 1952.

It is an arithmetic number, because the mean of its divisors is an integer number (28860).

2¹¹¹⁵⁶³ is an apocalyptic number.

111563 is a deficient number, since it is larger than the sum of its proper divisors (3877).

111563 is an equidigital number, since it uses as much as digits as its factorization.

111563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876.

The product of its digits is 90, while the sum is 17.

The square root of 111563 is about 334.0104788775. The cubic root of 111563 is about 48.1400711778.

Adding to 111563 its reverse (365111), we get a palindrome (476674).

The spelling of 111563 in words is "one hundred eleven thousand, five hundred sixty-three".