111243563 has 4 divisors (see below), whose sum is σ = 117787320. Its totient is φ = 104699808.

The previous prime is 111243553. The next prime is 111243569. The reversal of 111243563 is 365342111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365342111 = 14633 ⋅24967.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111243563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111243569) 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, 3271853 + ... + 3271886.

It is an arithmetic number, because the mean of its divisors is an integer number (29446830).

Almost surely, 2^111243563 is an apocalyptic number.

111243563 is a deficient number, since it is larger than the sum of its proper divisors (6543757).

111243563 is an equidigital number, since it uses as much as digits as its factorization.

111243563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543756.

The product of its digits is 2160, while the sum is 26.

The square root of 111243563 is about 10547.2064073858. The cubic root of 111243563 is about 480.9408095929.

Adding to 111243563 its reverse (365342111), we get a palindrome (476585674).

The spelling of 111243563 in words is "one hundred eleven million, two hundred forty-three thousand, five hundred sixty-three".