31330122320 has 160 divisors (see below), whose sum is σ = 84114402048. Its totient is φ = 10630692864.

The previous prime is 31330122319. The next prime is 31330122337. The reversal of 31330122320 is 2322103313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31330122292 and 31330122301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24533522 + ... + 24534798.

Almost surely, 2^31330122320 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 31330122320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42057201024).

31330122320 is an abundant number, since it is smaller than the sum of its proper divisors (52784279728).

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

31330122320 is a wasteful number, since it uses less digits than its factorization.

31330122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31330122320 its reverse (2322103313), we get a palindrome (33652225633).

The spelling of 31330122320 in words is "thirty-one billion, three hundred thirty million, one hundred twenty-two thousand, three hundred twenty".