111142431 has 24 divisors (see below), whose sum is σ = 167587056. Its totient is φ = 70911360.

The previous prime is 111142411. The next prime is 111142433. The reversal of 111142431 is 134241111.

It is not a de Polignac number, because 111142431 - 2⁷ = 111142303 is a prime.

It is a super-2 number, since 2×111142431² = 24705279937179522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111142433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16716 + ... + 22398.

It is an arithmetic number, because the mean of its divisors is an integer number (6982794).

Almost surely, 2^111142431 is an apocalyptic number.

111142431 is a deficient number, since it is larger than the sum of its proper divisors (56444625).

111142431 is a wasteful number, since it uses less digits than its factorization.

111142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783 (or 5780 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 111142431 is about 10542.4110619915. The cubic root of 111142431 is about 480.7950236218.

Adding to 111142431 its reverse (134241111), we get a palindrome (245383542).

The spelling of 111142431 in words is "one hundred eleven million, one hundred forty-two thousand, four hundred thirty-one".