3131240331 has 4 divisors (see below), whose sum is σ = 4174987112. Its totient is φ = 2087493552.

The previous prime is 3131240297. The next prime is 3131240339. The reversal of 3131240331 is 1330421313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3131240331 - 2⁶ = 3131240267 is a prime.

It is a super-2 number, since 2×3131240331² = 19609332020961979122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131240298 and 3131240307.

It is not an unprimeable number, because it can be changed into a prime (3131240339) 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, 521873386 + ... + 521873391.

It is an arithmetic number, because the mean of its divisors is an integer number (1043746778).

Almost surely, 2^3131240331 is an apocalyptic number.

3131240331 is a deficient number, since it is larger than the sum of its proper divisors (1043746781).

3131240331 is a wasteful number, since it uses less digits than its factorization.

3131240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043746780.

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

The square root of 3131240331 is about 55957.4868181193. The cubic root of 3131240331 is about 1462.9813867733.

Adding to 3131240331 its reverse (1330421313), we get a palindrome (4461661644).

The spelling of 3131240331 in words is "three billion, one hundred thirty-one million, two hundred forty thousand, three hundred thirty-one".