111123563 has 16 divisors (see below), whose sum is σ = 118039680. Its totient is φ = 104447616.

The previous prime is 111123559. The next prime is 111123581. The reversal of 111123563 is 365321111.

It is a cyclic number.

It is not a de Polignac number, because 111123563 - 2² = 111123559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111123553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302606 + ... + 302972.

It is an arithmetic number, because the mean of its divisors is an integer number (7377480).

Almost surely, 2^111123563 is an apocalyptic number.

111123563 is a deficient number, since it is larger than the sum of its proper divisors (6916117).

111123563 is a wasteful number, since it uses less digits than its factorization.

111123563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 540, while the sum is 23.

The square root of 111123563 is about 10541.5161622985. The cubic root of 111123563 is about 480.7678148297.

Adding to 111123563 its reverse (365321111), we get a palindrome (476444674).

The spelling of 111123563 in words is "one hundred eleven million, one hundred twenty-three thousand, five hundred sixty-three".