111303431 has 4 divisors (see below), whose sum is σ = 111330864. Its totient is φ = 111276000.

The previous prime is 111303427. The next prime is 111303443. The reversal of 111303431 is 134303111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111303431 - 2² = 111303427 is a prime.

It is a super-2 number, since 2×111303431² = 24776907504743522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111303461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6290 + ... + 16191.

It is an arithmetic number, because the mean of its divisors is an integer number (27832716).

Almost surely, 2^111303431 is an apocalyptic number.

111303431 is a deficient number, since it is larger than the sum of its proper divisors (27433).

111303431 is an equidigital number, since it uses as much as digits as its factorization.

111303431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27432.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 111303431 is about 10550.0441231305. The cubic root of 111303431 is about 481.0270701668.

Adding to 111303431 its reverse (134303111), we get a palindrome (245606542).

The spelling of 111303431 in words is "one hundred eleven million, three hundred three thousand, four hundred thirty-one".