13531551211543 has 4 divisors (see below), whose sum is σ = 14327524812240. Its totient is φ = 12735577610848.

The previous prime is 13531551211459. The next prime is 13531551211547. The reversal of 13531551211543 is 34511215513531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531551211543 is a prime.

It is a super-2 number, since 2×13531551211543² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13531551211496 and 13531551211505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531551211547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397986800323 + ... + 397986800356.

It is an arithmetic number, because the mean of its divisors is an integer number (3581881203060).

Almost surely, 2^{13531551211543} is an apocalyptic number.

13531551211543 is a deficient number, since it is larger than the sum of its proper divisors (795973600697).

13531551211543 is an equidigital number, since it uses as much as digits as its factorization.

13531551211543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795973600696.

The product of its digits is 135000, while the sum is 40.

The spelling of 13531551211543 in words is "thirteen trillion, five hundred thirty-one billion, five hundred fifty-one million, two hundred eleven thousand, five hundred forty-three".