13531205543 has 2 divisors, whose sum is σ = 13531205544. Its totient is φ = 13531205542.

The previous prime is 13531205507. The next prime is 13531205551. The reversal of 13531205543 is 34550213531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531205543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531205143) 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, 6765602771 + 6765602772.

It is an arithmetic number, because the mean of its divisors is an integer number (6765602772).

Almost surely, 2^13531205543 is an apocalyptic number.

13531205543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531205543 is an equidigital number, since it uses as much as digits as its factorization.

13531205543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 13531205543 in words is "thirteen billion, five hundred thirty-one million, two hundred five thousand, five hundred forty-three".