111431424 has 72 divisors (see below), whose sum is σ = 319411792. Its totient is φ = 34283520.

The previous prime is 111431417. The next prime is 111431459. The reversal of 111431424 is 424134111.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 111431424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4404 + ... + 15564.

Almost surely, 2^111431424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111431424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159705896).

111431424 is an abundant number, since it is smaller than the sum of its proper divisors (207980368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111431424 is a wasteful number, since it uses less digits than its factorization.

111431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193 (or 11179 counting only the distinct ones).

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

The square root of 111431424 is about 10556.1083738279. The cubic root of 111431424 is about 481.2113846792.

Adding to 111431424 its reverse (424134111), we get a palindrome (535565535).

The spelling of 111431424 in words is "one hundred eleven million, four hundred thirty-one thousand, four hundred twenty-four".