115531040 has 24 divisors (see below), whose sum is σ = 272942460. Its totient is φ = 46212352.

The previous prime is 115531021. The next prime is 115531049. The reversal of 115531040 is 40135511.

It can be written as a sum of positive squares in 2 ways, for example, as 115175824 + 355216 = 10732^2 + 596^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (115531049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360875 + ... + 361194.

Almost surely, 2^115531040 is an apocalyptic number.

115531040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115531040 is an abundant number, since it is smaller than the sum of its proper divisors (157411420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115531040 is an equidigital number, since it uses as much as digits as its factorization.

115531040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722084 (or 722076 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 115531040 is about 10748.5366445856. The cubic root of 115531040 is about 487.0417908022.

Adding to 115531040 its reverse (40135511), we get a palindrome (155666551).

The spelling of 115531040 in words is "one hundred fifteen million, five hundred thirty-one thousand, forty".