31023131323232 has 96 divisors (see below), whose sum is σ = 62880266633184. Its totient is φ = 15055599513600.

The previous prime is 31023131323199. The next prime is 31023131323243. The reversal of 31023131323232 is 23232313132013.

It is a junction number, because it is equal to n+sod(n) for n = 31023131323195 and 31023131323204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4001431868 + ... + 4001439620.

It is an arithmetic number, because the mean of its divisors is an integer number (655002777429).

Almost surely, 2^{31023131323232} is an apocalyptic number.

31023131323232 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 31023131323232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31440133316592).

31023131323232 is an abundant number, since it is smaller than the sum of its proper divisors (31857135309952).

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

31023131323232 is a wasteful number, since it uses less digits than its factorization.

31023131323232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15592 (or 15584 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 31023131323232 its reverse (23232313132013), we get a palindrome (54255444455245).

The spelling of 31023131323232 in words is "thirty-one trillion, twenty-three billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred thirty-two".