3123131320 has 16 divisors (see below), whose sum is σ = 7027045560. Its totient is φ = 1249252512.

The previous prime is 3123131317. The next prime is 3123131321. The reversal of 3123131320 is 231313213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123131321) 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 3 ways as a sum of consecutive naturals, for example, 39039102 + ... + 39039181.

Almost surely, 2^3123131320 is an apocalyptic number.

It is an amenable number.

3123131320 is an abundant number, since it is smaller than the sum of its proper divisors (3903914240).

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

3123131320 is a wasteful number, since it uses less digits than its factorization.

3123131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78078294 (or 78078290 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3123131320 is about 55884.9829560679. The cubic root of 3123131320 is about 1461.7173948154.

Adding to 3123131320 its reverse (231313213), we get a palindrome (3354444533).

The spelling of 3123131320 in words is "three billion, one hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty".