231244324443220 has 192 divisors, whose sum is σ = 548621579520000. Its totient is φ = 81101240640000.

The previous prime is 231244324443217. The next prime is 231244324443221. The reversal of 231244324443220 is 22344423442132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231244324443221) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 37594587145 + ... + 37594593295.

It is an arithmetic number, because the mean of its divisors is an integer number (2857404060000).

Almost surely, 2^{231244324443220} is an apocalyptic number.

231244324443220 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 231244324443220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274310789760000).

231244324443220 is an abundant number, since it is smaller than the sum of its proper divisors (317377255076780).

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

231244324443220 is a wasteful number, since it uses less digits than its factorization.

231244324443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11630 (or 11628 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 40.

Adding to 231244324443220 its reverse (22344423442132), we get a palindrome (253588747885352).

The spelling of 231244324443220 in words is "two hundred thirty-one trillion, two hundred forty-four billion, three hundred twenty-four million, four hundred forty-three thousand, two hundred twenty".