231303224020 has 96 divisors (see below), whose sum is σ = 532273908096. Its totient is φ = 83733504000.

The previous prime is 231303223961. The next prime is 231303224021. The reversal of 231303224020 is 20422303132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 231303223982 and 231303224000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231303224021) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 49665532 + ... + 49670188.

It is an arithmetic number, because the mean of its divisors is an integer number (5544519876).

Almost surely, 2^231303224020 is an apocalyptic number.

231303224020 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 231303224020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266136954048).

231303224020 is an abundant number, since it is smaller than the sum of its proper divisors (300970684076).

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

231303224020 is a wasteful number, since it uses less digits than its factorization.

231303224020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641 (or 5639 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 231303224020 its reverse (20422303132), we get a palindrome (251725527152).

The spelling of 231303224020 in words is "two hundred thirty-one billion, three hundred three million, two hundred twenty-four thousand, twenty".