231115340 has 24 divisors (see below), whose sum is σ = 513892512. Its totient is φ = 87008000.

The previous prime is 231115321. The next prime is 231115387. The reversal of 231115340 is 43511132.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 339536 + ... + 340215.

It is an arithmetic number, because the mean of its divisors is an integer number (21412188).

Almost surely, 2^231115340 is an apocalyptic number.

231115340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231115340 is an abundant number, since it is smaller than the sum of its proper divisors (282777172).

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

231115340 is a wasteful number, since it uses less digits than its factorization.

231115340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679777 (or 679775 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 231115340 is about 15202.4780874698. The cubic root of 231115340 is about 613.6813485182.

Adding to 231115340 its reverse (43511132), we get a palindrome (274626472).

The spelling of 231115340 in words is "two hundred thirty-one million, one hundred fifteen thousand, three hundred forty".