115531233031 has 4 divisors (see below), whose sum is σ = 115537727200. Its totient is φ = 115524738864.

The previous prime is 115531233019. The next prime is 115531233043. The reversal of 115531233031 is 130332135511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130332135511 = 97 ⋅1343630263.

It is an interprime number because it is at equal distance from previous prime (115531233019) and next prime (115531233043).

It is a cyclic number.

It is not a de Polignac number, because 115531233031 - 2⁷ = 115531232903 is a prime.

It is a super-2 number, since 2×115531233031² (a number of 23 digits) 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 (115531231031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3220326 + ... + 3256003.

It is an arithmetic number, because the mean of its divisors is an integer number (28884431800).

Almost surely, 2^115531233031 is an apocalyptic number.

115531233031 is a deficient number, since it is larger than the sum of its proper divisors (6494169).

115531233031 is an equidigital number, since it uses as much as digits as its factorization.

115531233031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494168.

The product of its (nonzero) digits is 4050, while the sum is 28.

Adding to 115531233031 its reverse (130332135511), we get a palindrome (245863368542).

The spelling of 115531233031 in words is "one hundred fifteen billion, five hundred thirty-one million, two hundred thirty-three thousand, thirty-one".