31321100322232 has 256 divisors, whose sum is σ = 73163343052800. Its totient is φ = 12271678848000.

The previous prime is 31321100322217. The next prime is 31321100322271. The reversal of 31321100322232 is 23222300112313.

It is a super-2 number, since 2×31321100322232² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31321100322197 and 31321100322206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1777276573 + ... + 1777294195.

It is an arithmetic number, because the mean of its divisors is an integer number (285794308800).

Almost surely, 2^{31321100322232} 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 31321100322232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36581671526400).

31321100322232 is an abundant number, since it is smaller than the sum of its proper divisors (41842242730568).

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

31321100322232 is a wasteful number, since it uses less digits than its factorization.

31321100322232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18138 (or 18134 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31321100322232 its reverse (23222300112313), we get a palindrome (54543400434545).

The spelling of 31321100322232 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred million, three hundred twenty-two thousand, two hundred thirty-two".