231440210144 has 96 divisors (see below), whose sum is σ = 535503830400. Its totient is φ = 97072012800.

The previous prime is 231440210123. The next prime is 231440210171. The reversal of 231440210144 is 441012044132.

231440210144 is digitally balanced in base 2, 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 (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15088559 + ... + 15103889.

It is an arithmetic number, because the mean of its divisors is an integer number (5578164900).

Almost surely, 2^231440210144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231440210144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267751915200).

231440210144 is an abundant number, since it is smaller than the sum of its proper divisors (304063620256).

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

231440210144 is a wasteful number, since it uses less digits than its factorization.

231440210144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18664 (or 18656 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 231440210144 its reverse (441012044132), we get a palindrome (672452254276).

The spelling of 231440210144 in words is "two hundred thirty-one billion, four hundred forty million, two hundred ten thousand, one hundred forty-four".