115528231 has 24 divisors (see below), whose sum is σ = 145960800. Its totient is φ = 91361088.

The previous prime is 115528213. The next prime is 115528307. The reversal of 115528231 is 132825511.

It is not a de Polignac number, because 115528231 - 2⁹ = 115527719 is a prime.

It is a super-2 number, since 2×115528231² = 26693544315978722, 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 115528231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115528031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56971 + ... + 58963.

It is an arithmetic number, because the mean of its divisors is an integer number (6081700).

Almost surely, 2^115528231 is an apocalyptic number.

115528231 is a deficient number, since it is larger than the sum of its proper divisors (30432569).

115528231 is an equidigital number, since it uses as much as digits as its factorization.

115528231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2013 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 115528231 is about 10748.4059748411. The cubic root of 115528231 is about 487.0378434894.

The spelling of 115528231 in words is "one hundred fifteen million, five hundred twenty-eight thousand, two hundred thirty-one".