6521543131 has 2 divisors, whose sum is σ = 6521543132. Its totient is φ = 6521543130.

The previous prime is 6521543117. The next prime is 6521543143. The reversal of 6521543131 is 1313451256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6521543131 - 2²⁵ = 6487988699 is a prime.

It is a super-2 number, since 2×6521543131² = 85061049618986566322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6521543093 and 6521543102.

It is not a weakly prime, because it can be changed into another prime (6521543101) 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 as a sum of consecutive naturals, namely, 3260771565 + 3260771566.

It is an arithmetic number, because the mean of its divisors is an integer number (3260771566).

Almost surely, 2^6521543131 is an apocalyptic number.

6521543131 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521543131 is an equidigital number, since it uses as much as digits as its factorization.

6521543131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 6521543131 is about 80756.0717902995. The cubic root of 6521543131 is about 1868.3150990500.

Adding to 6521543131 its reverse (1313451256), we get a palindrome (7834994387).

The spelling of 6521543131 in words is "six billion, five hundred twenty-one million, five hundred forty-three thousand, one hundred thirty-one".