6531271913 has 2 divisors, whose sum is σ = 6531271914. Its totient is φ = 6531271912.

The previous prime is 6531271867. The next prime is 6531271927. The reversal of 6531271913 is 3191721356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6500713129 + 30558784 = 80627^2 + 5528^2 .

It is a cyclic number.

It is not a de Polignac number, because 6531271913 - 2⁸ = 6531271657 is a prime.

It is not a weakly prime, because it can be changed into another prime (6531271963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265635956 + 3265635957.

It is an arithmetic number, because the mean of its divisors is an integer number (3265635957).

Almost surely, 2^6531271913 is an apocalyptic number.

It is an amenable number.

6531271913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6531271913 is an equidigital number, since it uses as much as digits as its factorization.

6531271913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 6531271913 is about 80816.2849492601. The cubic root of 6531271913 is about 1869.2436829216.

The spelling of 6531271913 in words is "six billion, five hundred thirty-one million, two hundred seventy-one thousand, nine hundred thirteen".