13531142447 has 2 divisors, whose sum is σ = 13531142448. Its totient is φ = 13531142446.

The previous prime is 13531142381. The next prime is 13531142473. The reversal of 13531142447 is 74424113531.

13531142447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13531142447 - 2¹² = 13531138351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531142047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765571223 + 6765571224.

It is an arithmetic number, because the mean of its divisors is an integer number (6765571224).

Almost surely, 2^13531142447 is an apocalyptic number.

13531142447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531142447 is an equidigital number, since it uses as much as digits as its factorization.

13531142447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

Adding to 13531142447 its reverse (74424113531), we get a palindrome (87955255978).

The spelling of 13531142447 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-two thousand, four hundred forty-seven".