111424431 has 8 divisors (see below), whose sum is σ = 148618800. Its totient is φ = 74256512.

The previous prime is 111424393. The next prime is 111424433. The reversal of 111424431 is 134424111.

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 111424431 - 2¹⁴ = 111408047 is a prime.

It is a super-2 number, since 2×111424431² = 24830807647347522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111424398 and 111424407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111424433) 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, 7561 + ... + 16733.

It is an arithmetic number, because the mean of its divisors is an integer number (18577350).

Almost surely, 2^111424431 is an apocalyptic number.

111424431 is a deficient number, since it is larger than the sum of its proper divisors (37194369).

111424431 is an equidigital number, since it uses as much as digits as its factorization.

111424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13225.

The product of its digits is 384, while the sum is 21.

The square root of 111424431 is about 10555.7771386099. Note that the first 3 decimals coincide. The cubic root of 111424431 is about 481.2013181543.

Adding to 111424431 its reverse (134424111), we get a palindrome (245848542).

The spelling of 111424431 in words is "one hundred eleven million, four hundred twenty-four thousand, four hundred thirty-one".