231311020332 has 216 divisors, whose sum is σ = 690889886400. Its totient is φ = 59886775872.

The previous prime is 231311020331. The next prime is 231311020393. The reversal of 231311020332 is 233020113132.

231311020332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231311020299 and 231311020308.

It is not an unprimeable number, because it can be changed into a prime (231311020331) 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 71 ways as a sum of consecutive naturals, for example, 5890419 + ... + 5929557.

Almost surely, 2^231311020332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231311020332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345444943200).

231311020332 is an abundant number, since it is smaller than the sum of its proper divisors (459578866068).

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

231311020332 is a wasteful number, since it uses less digits than its factorization.

231311020332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39225 (or 39193 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231311020332 its reverse (233020113132), we get a palindrome (464331133464).

The spelling of 231311020332 in words is "two hundred thirty-one billion, three hundred eleven million, twenty thousand, three hundred thirty-two".