115512031 has 4 divisors (see below), whose sum is σ = 115652200. Its totient is φ = 115371864.

The previous prime is 115511971. The next prime is 115512043. The reversal of 115512031 is 130215511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130215511 = 3637 ⋅35803.

It is a cyclic number.

It is not a de Polignac number, because 115512031 - 2¹⁵ = 115479263 is a prime.

It is a super-2 number, since 2×115512031² = 26686058611489922, 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 (115512071) 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, 68841 + ... + 70498.

It is an arithmetic number, because the mean of its divisors is an integer number (28913050).

Almost surely, 2^115512031 is an apocalyptic number.

115512031 is a deficient number, since it is larger than the sum of its proper divisors (140169).

115512031 is an equidigital number, since it uses as much as digits as its factorization.

115512031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140168.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 115512031 is about 10747.6523483038. The cubic root of 115512031 is about 487.0150773891.

Adding to 115512031 its reverse (130215511), we get a palindrome (245727542).

The spelling of 115512031 in words is "one hundred fifteen million, five hundred twelve thousand, thirty-one".