111431141 has 4 divisors (see below), whose sum is σ = 117985932. Its totient is φ = 104876352.

The previous prime is 111431129. The next prime is 111431167. The reversal of 111431141 is 141134111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141134111 = 11863 ⋅11897.

It can be written as a sum of positive squares in 2 ways, for example, as 36954241 + 74476900 = 6079^2 + 8630^2 .

It is a cyclic number.

It is not a de Polignac number, because 111431141 - 2⁶ = 111431077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6554773 = 111431141 / (1 + 1 + 1 + 4 + 3 + 1 + 1 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111431041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277370 + ... + 3277403.

It is an arithmetic number, because the mean of its divisors is an integer number (29496483).

Almost surely, 2^111431141 is an apocalyptic number.

It is an amenable number.

111431141 is a deficient number, since it is larger than the sum of its proper divisors (6554791).

111431141 is an equidigital number, since it uses as much as digits as its factorization.

111431141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6554790.

The product of its digits is 48, while the sum is 17.

The square root of 111431141 is about 10556.0949692583. The cubic root of 111431141 is about 481.2109773048.

Adding to 111431141 its reverse (141134111), we get a palindrome (252565252).

The spelling of 111431141 in words is "one hundred eleven million, four hundred thirty-one thousand, one hundred forty-one".