231331043420 has 48 divisors (see below), whose sum is σ = 487108702080. Its totient is φ = 92282551296.

The previous prime is 231331043389. The next prime is 231331043477. The reversal of 231331043420 is 24340133132.

It is a self number, because there is not a number n which added to its sum of digits gives 231331043420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12313154 + ... + 12331926.

It is an arithmetic number, because the mean of its divisors is an integer number (10148097960).

Almost surely, 2^231331043420 is an apocalyptic number.

231331043420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231331043420 is an abundant number, since it is smaller than the sum of its proper divisors (255777658660).

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

231331043420 is a wasteful number, since it uses less digits than its factorization.

231331043420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414 (or 20412 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 231331043420 its reverse (24340133132), we get a palindrome (255671176552).

The spelling of 231331043420 in words is "two hundred thirty-one billion, three hundred thirty-one million, forty-three thousand, four hundred twenty".