231115040 has 96 divisors (see below), whose sum is σ = 613702656. Its totient is φ = 81607680.

The previous prime is 231115021. The next prime is 231115043. The reversal of 231115040 is 40511132.

It is not an unprimeable number, because it can be changed into a prime (231115043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45425 + ... + 50255.

It is an arithmetic number, because the mean of its divisors is an integer number (6392736).

Almost surely, 2^231115040 is an apocalyptic number.

231115040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231115040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306851328).

231115040 is an abundant number, since it is smaller than the sum of its proper divisors (382587616).

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

231115040 is a wasteful number, since it uses less digits than its factorization.

231115040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882 (or 4874 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 231115040 is about 15202.4682206542. The cubic root of 231115040 is about 613.6810829878.

Adding to 231115040 its reverse (40511132), we get a palindrome (271626172).

The spelling of 231115040 in words is "two hundred thirty-one million, one hundred fifteen thousand, forty".