111145503 has 16 divisors (see below), whose sum is σ = 169511936. Its totient is φ = 63456480.

The previous prime is 111145483. The next prime is 111145511. The reversal of 111145503 is 305541111.

It is a happy number.

It is not a de Polignac number, because 111145503 - 2⁹ = 111144991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111145503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111145543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45450 + ... + 47832.

It is an arithmetic number, because the mean of its divisors is an integer number (10594496).

Almost surely, 2^111145503 is an apocalyptic number.

111145503 is a deficient number, since it is larger than the sum of its proper divisors (58366433).

111145503 is a wasteful number, since it uses less digits than its factorization.

111145503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 111145503 is about 10542.5567582062. The cubic root of 111145503 is about 480.7994533393.

Adding to 111145503 its reverse (305541111), we get a palindrome (416686614).

The spelling of 111145503 in words is "one hundred eleven million, one hundred forty-five thousand, five hundred three".