111431140 has 48 divisors (see below), whose sum is σ = 239828400. Its totient is φ = 43476480.

The previous prime is 111431129. The next prime is 111431167. The reversal of 111431140 is 41134111.

It can be written as a sum of positive squares in 8 ways, for example, as 74269924 + 37161216 = 8618^2 + 6096^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181474 + ... + 182086.

It is an arithmetic number, because the mean of its divisors is an integer number (4996425).

Almost surely, 2^111431140 is an apocalyptic number.

111431140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111431140 is an abundant number, since it is smaller than the sum of its proper divisors (128397260).

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

111431140 is a wasteful number, since it uses less digits than its factorization.

111431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 111431140 is about 10556.0949218923. The cubic root of 111431140 is about 481.2109758653.

Adding to 111431140 its reverse (41134111), we get a palindrome (152565251).

The spelling of 111431140 in words is "one hundred eleven million, four hundred thirty-one thousand, one hundred forty".