31332232013320 has 128 divisors (see below), whose sum is σ = 83172506941440. Its totient is φ = 10395332536320.

The previous prime is 31332232013297. The next prime is 31332232013359. The reversal of 31332232013320 is 2331023223313.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 160421644 + ... + 160616836.

It is an arithmetic number, because the mean of its divisors is an integer number (649785210480).

Almost surely, 2^{31332232013320} 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 31332232013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41586253470720).

31332232013320 is an abundant number, since it is smaller than the sum of its proper divisors (51840274928120).

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

31332232013320 is a wasteful number, since it uses less digits than its factorization.

31332232013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213735 (or 213731 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 31332232013320 its reverse (2331023223313), we get a palindrome (33663255236633).

The spelling of 31332232013320 in words is "thirty-one trillion, three hundred thirty-two billion, two hundred thirty-two million, thirteen thousand, three hundred twenty".