111432431 has 8 divisors (see below), whose sum is σ = 122110464. Its totient is φ = 100845720.

The previous prime is 111432407. The next prime is 111432437. The reversal of 111432431 is 134234111.

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 111432431 - 2⁶ = 111432367 is a prime.

It is a super-2 number, since 2×111432431² = 24834373357139522, 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 (111432437) 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, 20261 + ... + 25166.

It is an arithmetic number, because the mean of its divisors is an integer number (15263808).

Almost surely, 2^111432431 is an apocalyptic number.

111432431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111432431 is a deficient number, since it is larger than the sum of its proper divisors (10678033).

111432431 is a wasteful number, since it uses less digits than its factorization.

111432431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45661.

The product of its digits is 288, while the sum is 20.

The square root of 111432431 is about 10556.1560712221. The cubic root of 111432431 is about 481.2128342356.

Adding to 111432431 its reverse (134234111), we get a palindrome (245666542).

The spelling of 111432431 in words is "one hundred eleven million, four hundred thirty-two thousand, four hundred thirty-one".