231134140 has 24 divisors (see below), whose sum is σ = 501040512. Its totient is φ = 89471040.

The previous prime is 231134129. The next prime is 231134149. The reversal of 231134140 is 41431132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231134149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185779 + ... + 187018.

It is an arithmetic number, because the mean of its divisors is an integer number (20876688).

Almost surely, 2^231134140 is an apocalyptic number.

231134140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231134140 is an abundant number, since it is smaller than the sum of its proper divisors (269906372).

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

231134140 is a wasteful number, since it uses less digits than its factorization.

231134140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372837 (or 372835 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231134140 is about 15203.0963951427. The cubic root of 231134140 is about 613.6979879684.

Adding to 231134140 its reverse (41431132), we get a palindrome (272565272).

The spelling of 231134140 in words is "two hundred thirty-one million, one hundred thirty-four thousand, one hundred forty".