3131240313 has 4 divisors (see below), whose sum is σ = 4174987088. Its totient is φ = 2087493540.

The previous prime is 3131240297. The next prime is 3131240339. The reversal of 3131240313 is 3130421313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3131240313 - 2⁴ = 3131240297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131240313.

It is not an unprimeable number, because it can be changed into a prime (3131240383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521873383 + ... + 521873388.

It is an arithmetic number, because the mean of its divisors is an integer number (1043746772).

Almost surely, 2^3131240313 is an apocalyptic number.

It is an amenable number.

3131240313 is a deficient number, since it is larger than the sum of its proper divisors (1043746775).

3131240313 is a wasteful number, since it uses less digits than its factorization.

3131240313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043746774.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 3131240313 is about 55957.4866572830. The cubic root of 3131240313 is about 1462.9813839699.

Adding to 3131240313 its reverse (3130421313), we get a palindrome (6261661626).

The spelling of 3131240313 in words is "three billion, one hundred thirty-one million, two hundred forty thousand, three hundred thirteen".