31321231132 has 24 divisors (see below), whose sum is σ = 56113759856. Its totient is φ = 15289077888.

The previous prime is 31321231129. The next prime is 31321231159. The reversal of 31321231132 is 23113212313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324958 + ... + 410170.

Almost surely, 2^31321231132 is an apocalyptic number.

It is an amenable number.

31321231132 is a deficient number, since it is larger than the sum of its proper divisors (24792528724).

31321231132 is a wasteful number, since it uses less digits than its factorization.

31321231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87397 (or 87395 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 31321231132 its reverse (23113212313), we get a palindrome (54434443445).

The spelling of 31321231132 in words is "thirty-one billion, three hundred twenty-one million, two hundred thirty-one thousand, one hundred thirty-two".