111425231 has 2 divisors, whose sum is σ = 111425232. Its totient is φ = 111425230.

The previous prime is 111425219. The next prime is 111425257. The reversal of 111425231 is 132524111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111425231 is a prime.

It is a super-2 number, since 2×111425231² = 24831164206806722, 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 (111425261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55712615 + 55712616.

It is an arithmetic number, because the mean of its divisors is an integer number (55712616).

Almost surely, 2^111425231 is an apocalyptic number.

111425231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111425231 is an equidigital number, since it uses as much as digits as its factorization.

111425231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 111425231 is about 10555.8150324833. The cubic root of 111425231 is about 481.2024697872.

Adding to 111425231 its reverse (132524111), we get a palindrome (243949342).

The spelling of 111425231 in words is "one hundred eleven million, four hundred twenty-five thousand, two hundred thirty-one".