323131010040 has 96 divisors (see below), whose sum is σ = 1051230286080. Its totient is φ = 86081746176.

The previous prime is 323131010023. The next prime is 323131010047. The reversal of 323131010040 is 40010131323.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 323131009995 and 323131010022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323131010047) 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 23 ways as a sum of consecutive naturals, for example, 91224 + ... + 809063.

It is an arithmetic number, because the mean of its divisors is an integer number (10950315480).

Almost surely, 2^323131010040 is an apocalyptic number.

323131010040 is a gapful number since it is divisible by the number (30) 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 323131010040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525615143040).

323131010040 is an abundant number, since it is smaller than the sum of its proper divisors (728099276040).

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

323131010040 is a wasteful number, since it uses less digits than its factorization.

323131010040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901301 (or 901294 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 323131010040 its reverse (40010131323), we get a palindrome (363141141363).

The spelling of 323131010040 in words is "three hundred twenty-three billion, one hundred thirty-one million, ten thousand, forty".