31123133332 has 12 divisors (see below), whose sum is σ = 54467910196. Its totient is φ = 15560873280.

The previous prime is 31123133317. The next prime is 31123133339. The reversal of 31123133332 is 23333132113.

It can be written as a sum of positive squares in 2 ways, for example, as 8426505616 + 22696627716 = 91796^2 + 150654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31123133297 and 31123133306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123133339) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 64803 + ... + 257770.

Almost surely, 2^31123133332 is an apocalyptic number.

It is an amenable number.

31123133332 is a deficient number, since it is larger than the sum of its proper divisors (23344776864).

31123133332 is a wasteful number, since it uses less digits than its factorization.

31123133332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346698 (or 346696 counting only the distinct ones).

The product of its digits is 2916, while the sum is 25.

Adding to 31123133332 its reverse (23333132113), we get a palindrome (54456265445).

The spelling of 31123133332 in words is "thirty-one billion, one hundred twenty-three million, one hundred thirty-three thousand, three hundred thirty-two".