111431139 has 8 divisors (see below), whose sum is σ = 148974672. Its totient is φ = 74087520.

The previous prime is 111431129. The next prime is 111431167. The reversal of 111431139 is 931134111.

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

It is not a de Polignac number, because 111431139 - 2²⁰ = 110382563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111431129) 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, 48672 + ... + 50909.

It is an arithmetic number, because the mean of its divisors is an integer number (18621834).

Almost surely, 2^111431139 is an apocalyptic number.

111431139 is a deficient number, since it is larger than the sum of its proper divisors (37543533).

111431139 is an equidigital number, since it uses as much as digits as its factorization.

111431139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99957.

The product of its digits is 324, while the sum is 24.

The square root of 111431139 is about 10556.0948745263. The cubic root of 111431139 is about 481.2109744258.

The spelling of 111431139 in words is "one hundred eleven million, four hundred thirty-one thousand, one hundred thirty-nine".