115131131 has 4 divisors (see below), whose sum is σ = 119101200. Its totient is φ = 111161064.

The previous prime is 115131119. The next prime is 115131139. The reversal of 115131131 is 131131511.

It is a happy number.

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 115131131 - 2²⁶ = 48022267 is a prime.

It is a super-2 number, since 2×115131131² = 26510354650678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115131139) 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, 1984991 + ... + 1985048.

It is an arithmetic number, because the mean of its divisors is an integer number (29775300).

Almost surely, 2^115131131 is an apocalyptic number.

115131131 is a deficient number, since it is larger than the sum of its proper divisors (3970069).

115131131 is an equidigital number, since it uses as much as digits as its factorization.

115131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970068.

The product of its digits is 45, while the sum is 17.

The square root of 115131131 is about 10729.9175672509. The cubic root of 115131131 is about 486.4791784728.

Adding to 115131131 its reverse (131131511), we get a palindrome (246262642).

The spelling of 115131131 in words is "one hundred fifteen million, one hundred thirty-one thousand, one hundred thirty-one".