31132331320 has 32 divisors (see below), whose sum is σ = 71940931200. Its totient is φ = 12116366208.

The previous prime is 31132331267. The next prime is 31132331323. The reversal of 31132331320 is 2313323113.

It is a junction number, because it is equal to n+sod(n) for n = 31132331291 and 31132331300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132331323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10516200 + ... + 10519159.

It is an arithmetic number, because the mean of its divisors is an integer number (2248154100).

Almost surely, 2^31132331320 is an apocalyptic number.

It is an amenable number.

31132331320 is an abundant number, since it is smaller than the sum of its proper divisors (40808599880).

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

31132331320 is a wasteful number, since it uses less digits than its factorization.

31132331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21035407 (or 21035403 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31132331320 its reverse (2313323113), we get a palindrome (33445654433).

The spelling of 31132331320 in words is "thirty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, three hundred twenty".