231040032720 has 960 divisors, whose sum is σ = 917651980800. Its totient is φ = 47026667520.

The previous prime is 231040032697. The next prime is 231040032721. The reversal of 231040032720 is 27230040132.

231040032720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231040032721) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 858884746 + ... + 858885014.

It is an arithmetic number, because the mean of its divisors is an integer number (955887480).

Almost surely, 2^231040032720 is an apocalyptic number.

231040032720 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 231040032720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458825990400).

231040032720 is an abundant number, since it is smaller than the sum of its proper divisors (686611948080).

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

231040032720 is a wasteful number, since it uses less digits than its factorization.

231040032720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

Adding to 231040032720 its reverse (27230040132), we get a palindrome (258270072852).

The spelling of 231040032720 in words is "two hundred thirty-one billion, forty million, thirty-two thousand, seven hundred twenty".