3131240312 has 32 divisors (see below), whose sum is σ = 6064982400. Its totient is φ = 1513987200.

The previous prime is 3131240297. The next prime is 3131240339. The reversal of 3131240312 is 2130421313.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 398114 + ... + 405902.

It is an arithmetic number, because the mean of its divisors is an integer number (189530700).

Almost surely, 2^3131240312 is an apocalyptic number.

It is an amenable number.

3131240312 is a deficient number, since it is larger than the sum of its proper divisors (2933742088).

3131240312 is a wasteful number, since it uses less digits than its factorization.

3131240312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447 (or 9443 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3131240312 is about 55957.4866483476. The cubic root of 3131240312 is about 1462.9813838142.

Adding to 3131240312 its reverse (2130421313), we get a palindrome (5261661625).

The spelling of 3131240312 in words is "three billion, one hundred thirty-one million, two hundred forty thousand, three hundred twelve".