3131403643513 has 2 divisors, whose sum is σ = 3131403643514. Its totient is φ = 3131403643512.

The previous prime is 3131403643483. The next prime is 3131403643541. The reversal of 3131403643513 is 3153463041313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3109025877049 + 22377766464 = 1763243^2 + 149592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131403643513 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131403643583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565701821756 + 1565701821757.

It is an arithmetic number, because the mean of its divisors is an integer number (1565701821757).

Almost surely, 2^{3131403643513} is an apocalyptic number.

It is an amenable number.

3131403643513 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131403643513 is an equidigital number, since it uses as much as digits as its factorization.

3131403643513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 3131403643513 its reverse (3153463041313), we get a palindrome (6284866684826).

The spelling of 3131403643513 in words is "three trillion, one hundred thirty-one billion, four hundred three million, six hundred forty-three thousand, five hundred thirteen".