111132431 has 8 divisors (see below), whose sum is σ = 114064560. Its totient is φ = 108237888.

The previous prime is 111132403. The next prime is 111132433. The reversal of 111132431 is 134231111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111132431 is a prime.

It is a super-2 number, since 2×111132431² = 24700834439939522, 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 (111132433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3356 + ... + 15281.

It is an arithmetic number, because the mean of its divisors is an integer number (14258070).

Almost surely, 2^111132431 is an apocalyptic number.

111132431 is a deficient number, since it is larger than the sum of its proper divisors (2932129).

111132431 is an equidigital number, since it uses as much as digits as its factorization.

111132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18793.

The product of its digits is 72, while the sum is 17.

The square root of 111132431 is about 10541.9367765131. The cubic root of 111132431 is about 480.7806034033.

Adding to 111132431 its reverse (134231111), we get a palindrome (245363542).

The spelling of 111132431 in words is "one hundred eleven million, one hundred thirty-two thousand, four hundred thirty-one".