13543122243531 has 4 divisors (see below), whose sum is σ = 18057496324712. Its totient is φ = 9028748162352.

The previous prime is 13543122243503. The next prime is 13543122243533. The reversal of 13543122243531 is 13534222134531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13543122243531 - 2¹³ = 13543122235339 is a prime.

It is a super-2 number, since 2×13543122243531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13543122243531.

It is not an unprimeable number, because it can be changed into a prime (13543122243533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257187040586 + ... + 2257187040591.

It is an arithmetic number, because the mean of its divisors is an integer number (4514374081178).

Almost surely, 2^{13543122243531} is an apocalyptic number.

13543122243531 is a deficient number, since it is larger than the sum of its proper divisors (4514374081181).

13543122243531 is an equidigital number, since it uses as much as digits as its factorization.

13543122243531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514374081180.

The product of its digits is 259200, while the sum is 39.

The spelling of 13543122243531 in words is "thirteen trillion, five hundred forty-three billion, one hundred twenty-two million, two hundred forty-three thousand, five hundred thirty-one".