31302020322 has 64 divisors (see below), whose sum is σ = 70340918400. Its totient is φ = 10317242880.

The previous prime is 31302020297. The next prime is 31302020341. The reversal of 31302020322 is 22302020313.

It is a happy number.

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 = 31302020295 and 31302020304.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3282922 + ... + 3292442.

It is an arithmetic number, because the mean of its divisors is an integer number (1099076850).

Almost surely, 2^31302020322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31302020322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35170459200).

31302020322 is an abundant number, since it is smaller than the sum of its proper divisors (39038898078).

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

31302020322 is a wasteful number, since it uses less digits than its factorization.

31302020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208 (or 10202 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31302020322 its reverse (22302020313), we get a palindrome (53604040635).

Subtracting from 31302020322 its reverse (22302020313), we obtain a palindrome (9000000009).

The spelling of 31302020322 in words is "thirty-one billion, three hundred two million, twenty thousand, three hundred twenty-two".