231240131040 has 192 divisors, whose sum is σ = 740847824640. Its totient is φ = 60619653120.

The previous prime is 231240130973. The next prime is 231240131041. The reversal of 231240131040 is 40131042132.

It is a junction number, because it is equal to n+sod(n) for n = 231240130998 and 231240131016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240131041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6710976 + ... + 6745344.

It is an arithmetic number, because the mean of its divisors is an integer number (3858582420).

Almost surely, 2^231240131040 is an apocalyptic number.

231240131040 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 231240131040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370423912320).

231240131040 is an abundant number, since it is smaller than the sum of its proper divisors (509607693600).

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

231240131040 is a wasteful number, since it uses less digits than its factorization.

231240131040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34625 (or 34617 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 231240131040 its reverse (40131042132), we get a palindrome (271371173172).

The spelling of 231240131040 in words is "two hundred thirty-one billion, two hundred forty million, one hundred thirty-one thousand, forty".