111813159 has 4 divisors (see below), whose sum is σ = 149084216. Its totient is φ = 74542104.

The previous prime is 111813137. The next prime is 111813173. The reversal of 111813159 is 951318111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111813159 - 2⁸ = 111812903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111813059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18635524 + ... + 18635529.

It is an arithmetic number, because the mean of its divisors is an integer number (37271054).

Almost surely, 2^111813159 is an apocalyptic number.

111813159 is a deficient number, since it is larger than the sum of its proper divisors (37271057).

111813159 is an equidigital number, since it uses as much as digits as its factorization.

111813159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37271056.

The product of its digits is 1080, while the sum is 30.

The square root of 111813159 is about 10574.1741521501. The cubic root of 111813159 is about 481.7602599595.

The spelling of 111813159 in words is "one hundred eleven million, eight hundred thirteen thousand, one hundred fifty-nine".