111312523 has 4 divisors (see below), whose sum is σ = 127214320. Its totient is φ = 95410728.

The previous prime is 111312511. The next prime is 111312563. The reversal of 111312523 is 325213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325213111 = 17 ⋅19130183.

It is not a de Polignac number, because 111312523 - 2²⁵ = 77758091 is a prime.

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 111312523.

It is not an unprimeable number, because it can be changed into a prime (111312563) 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, 7950888 + ... + 7950901.

It is an arithmetic number, because the mean of its divisors is an integer number (31803580).

Almost surely, 2^111312523 is an apocalyptic number.

111312523 is a deficient number, since it is larger than the sum of its proper divisors (15901797).

111312523 is an equidigital number, since it uses as much as digits as its factorization.

111312523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15901796.

The product of its digits is 180, while the sum is 19.

The square root of 111312523 is about 10550.4750130030. The cubic root of 111312523 is about 481.0401676338.

Adding to 111312523 its reverse (325213111), we get a palindrome (436525634).

The spelling of 111312523 in words is "one hundred eleven million, three hundred twelve thousand, five hundred twenty-three".