115243231 has 2 divisors, whose sum is σ = 115243232. Its totient is φ = 115243230.

The previous prime is 115243223. The next prime is 115243237. The reversal of 115243231 is 132342511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115243231 - 2³ = 115243223 is a prime.

It is a super-2 number, since 2×115243231² = 26562004582638722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115243237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57621615 + 57621616.

It is an arithmetic number, because the mean of its divisors is an integer number (57621616).

Almost surely, 2^115243231 is an apocalyptic number.

115243231 is a deficient number, since it is larger than the sum of its proper divisors (1).

115243231 is an equidigital number, since it uses as much as digits as its factorization.

115243231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 115243231 is about 10735.1400084023. The cubic root of 115243231 is about 486.6370176992.

Subtracting from 115243231 its product of digits (720), we obtain a palindrome (115242511).

Adding to 115243231 its reverse (132342511), we get a palindrome (247585742).

The spelling of 115243231 in words is "one hundred fifteen million, two hundred forty-three thousand, two hundred thirty-one".