115816231 has 4 divisors (see below), whose sum is σ = 116554072. Its totient is φ = 115078392.

The previous prime is 115816219. The next prime is 115816273. The reversal of 115816231 is 132618511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132618511 = 3371 ⋅39341.

It is a cyclic number.

It is not a de Polignac number, because 115816231 - 2¹⁷ = 115685159 is a prime.

It is a super-2 number, since 2×115816231² = 26826798726090722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115816231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115810231) 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, 368685 + ... + 368998.

It is an arithmetic number, because the mean of its divisors is an integer number (29138518).

Almost surely, 2^115816231 is an apocalyptic number.

115816231 is a deficient number, since it is larger than the sum of its proper divisors (737841).

115816231 is an equidigital number, since it uses as much as digits as its factorization.

115816231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737840.

The product of its digits is 1440, while the sum is 28.

The square root of 115816231 is about 10761.7949711003. The cubic root of 115816231 is about 487.4422194065.

The spelling of 115816231 in words is "one hundred fifteen million, eight hundred sixteen thousand, two hundred thirty-one".