31321031133 has 48 divisors (see below), whose sum is σ = 50834121216. Its totient is φ = 17082938880.

The previous prime is 31321031123. The next prime is 31321031167. The reversal of 31321031133 is 33113012313.

It is not a de Polignac number, because 31321031133 - 2⁴ = 31321031117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321031123) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 285585 + ... + 379737.

It is an arithmetic number, because the mean of its divisors is an integer number (1059044192).

Almost surely, 2^31321031133 is an apocalyptic number.

It is an amenable number.

31321031133 is a deficient number, since it is larger than the sum of its proper divisors (19513090083).

31321031133 is a wasteful number, since it uses less digits than its factorization.

31321031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94274 (or 94267 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31321031133 its reverse (33113012313), we get a palindrome (64434043446).

The spelling of 31321031133 in words is "thirty-one billion, three hundred twenty-one million, thirty-one thousand, one hundred thirty-three".