111623431 has 8 divisors (see below), whose sum is σ = 113747328. Its totient is φ = 109515000.

The previous prime is 111623419. The next prime is 111623437. The reversal of 111623431 is 134326111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111623431 - 2⁹ = 111622919 is a prime.

It is a super-2 number, since 2×111623431² = 24919580696423522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111623437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11256 + ... + 18706.

It is an arithmetic number, because the mean of its divisors is an integer number (14218416).

Almost surely, 2^111623431 is an apocalyptic number.

111623431 is a deficient number, since it is larger than the sum of its proper divisors (2123897).

111623431 is an equidigital number, since it uses as much as digits as its factorization.

111623431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733.

The product of its digits is 432, while the sum is 22.

The square root of 111623431 is about 10565.1990516033. The cubic root of 111623431 is about 481.4876171600.

Adding to 111623431 its reverse (134326111), we get a palindrome (245949542).

The spelling of 111623431 in words is "one hundred eleven million, six hundred twenty-three thousand, four hundred thirty-one".