231131202043504 has 160 divisors (see below), whose sum is σ = 534099209748480. Its totient is φ = 94799945769984.

The previous prime is 231131202043493. The next prime is 231131202043513. The reversal of 231131202043504 is 405340202131132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448125414 + ... + 448640890.

It is an arithmetic number, because the mean of its divisors is an integer number (3338120060928).

Almost surely, 2^{231131202043504} 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 231131202043504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267049604874240).

231131202043504 is an abundant number, since it is smaller than the sum of its proper divisors (302968007704976).

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

231131202043504 is a wasteful number, since it uses less digits than its factorization.

231131202043504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516735 (or 516729 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 231131202043504 its reverse (405340202131132), we get a palindrome (636471404174636).

The spelling of 231131202043504 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, two hundred two million, forty-three thousand, five hundred four".