321131543232 has 224 divisors, whose sum is σ = 885586597632. Its totient is φ = 102628786176.

The previous prime is 321131543203. The next prime is 321131543237. The reversal of 321131543232 is 232345131123.

It is a self number, because there is not a number n which added to its sum of digits gives 321131543232.

It is not an unprimeable number, because it can be changed into a prime (321131543237) 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 31 ways as a sum of consecutive naturals, for example, 99821688 + ... + 99824904.

Almost surely, 2^321131543232 is an apocalyptic number.

321131543232 is a gapful number since it is divisible by the number (32) 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 321131543232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442793298816).

321131543232 is an abundant number, since it is smaller than the sum of its proper divisors (564455054400).

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

321131543232 is a wasteful number, since it uses less digits than its factorization.

321131543232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495 (or 3485 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

Adding to 321131543232 its reverse (232345131123), we get a palindrome (553476674355).

The spelling of 321131543232 in words is "three hundred twenty-one billion, one hundred thirty-one million, five hundred forty-three thousand, two hundred thirty-two".