115993231 has 4 divisors (see below), whose sum is σ = 118690792. Its totient is φ = 113295672.

The previous prime is 115993219. The next prime is 115993237. The reversal of 115993231 is 132399511.

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 115993231 - 2⁹ = 115992719 is a prime.

It is a super-2 number, since 2×115993231² = 26908859275638722, 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 (115993237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348716 + ... + 1348801.

It is an arithmetic number, because the mean of its divisors is an integer number (29672698).

Almost surely, 2^115993231 is an apocalyptic number.

115993231 is a deficient number, since it is larger than the sum of its proper divisors (2697561).

115993231 is an equidigital number, since it uses as much as digits as its factorization.

115993231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697560.

The product of its digits is 7290, while the sum is 34.

The square root of 115993231 is about 10770.0153667486. The cubic root of 115993231 is about 487.6904095993.

The spelling of 115993231 in words is "one hundred fifteen million, nine hundred ninety-three thousand, two hundred thirty-one".