231324144420 has 48 divisors (see below), whose sum is σ = 647845248960. Its totient is φ = 61673329536.

The previous prime is 231324144391. The next prime is 231324144439. The reversal of 231324144420 is 24441423132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123310 + ... + 691269.

It is an arithmetic number, because the mean of its divisors is an integer number (13496776020).

Almost surely, 2^231324144420 is an apocalyptic number.

231324144420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231324144420 is an abundant number, since it is smaller than the sum of its proper divisors (416521104540).

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

231324144420 is a wasteful number, since it uses less digits than its factorization.

231324144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819324 (or 819322 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 231324144420 its reverse (24441423132), we get a palindrome (255765567552).

The spelling of 231324144420 in words is "two hundred thirty-one billion, three hundred twenty-four million, one hundred forty-four thousand, four hundred twenty".