31130322220332 has 144 divisors (see below), whose sum is σ = 81771022831680. Its totient is φ = 9973877760000.

The previous prime is 31130322220331. The next prime is 31130322220451. The reversal of 31130322220332 is 23302222303113.

31130322220332 is a `hidden beast` number, since 3 + 1 + 1 + 3 + 0 + 322 + 2 + 2 + 0 + 332 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31130322220296 and 31130322220305.

It is not an unprimeable number, because it can be changed into a prime (31130322220331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221417457 + ... + 221558007.

It is an arithmetic number, because the mean of its divisors is an integer number (567854325220).

Almost surely, 2^{31130322220332} 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 31130322220332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40885511415840).

31130322220332 is an abundant number, since it is smaller than the sum of its proper divisors (50640700611348).

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

31130322220332 is a wasteful number, since it uses less digits than its factorization.

31130322220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141544 (or 141539 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 31130322220332 its reverse (23302222303113), we get a palindrome (54432544523445).

The spelling of 31130322220332 in words is "thirty-one trillion, one hundred thirty billion, three hundred twenty-two million, two hundred twenty thousand, three hundred thirty-two".