111403231 has 2 divisors, whose sum is σ = 111403232. Its totient is φ = 111403230.

The previous prime is 111403223. The next prime is 111403249. The reversal of 111403231 is 132304111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111403231 - 2³ = 111403223 is a prime.

It is a super-2 number, since 2×111403231² = 24821359754478722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111403211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55701615 + 55701616.

It is an arithmetic number, because the mean of its divisors is an integer number (55701616).

Almost surely, 2^111403231 is an apocalyptic number.

111403231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111403231 is an equidigital number, since it uses as much as digits as its factorization.

111403231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 111403231 is about 10554.7729013939. The cubic root of 111403231 is about 481.1707978728.

Adding to 111403231 its reverse (132304111), we get a palindrome (243707342).

The spelling of 111403231 in words is "one hundred eleven million, four hundred three thousand, two hundred thirty-one".