111042431 has 2 divisors, whose sum is σ = 111042432. Its totient is φ = 111042430.

The previous prime is 111042427. The next prime is 111042461. The reversal of 111042431 is 134240111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111042431 - 2² = 111042427 is a prime.

It is a super-2 number, since 2×111042431² = 24660842964779522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111042401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55521215 + 55521216.

It is an arithmetic number, because the mean of its divisors is an integer number (55521216).

Almost surely, 2^111042431 is an apocalyptic number.

111042431 is a deficient number, since it is larger than the sum of its proper divisors (1).

111042431 is an equidigital number, since it uses as much as digits as its factorization.

111042431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 111042431 is about 10537.6672465968. The cubic root of 111042431 is about 480.6507824923.

Adding to 111042431 its reverse (134240111), we get a palindrome (245282542).

The spelling of 111042431 in words is "one hundred eleven million, forty-two thousand, four hundred thirty-one".