13261443143 has 4 divisors (see below), whose sum is σ = 14281554168. Its totient is φ = 12241332120.

The previous prime is 13261443137. The next prime is 13261443163. The reversal of 13261443143 is 34134416231.

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-13261443143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13261443103) 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, 510055493 + ... + 510055518.

It is an arithmetic number, because the mean of its divisors is an integer number (3570388542).

Almost surely, 2^13261443143 is an apocalyptic number.

13261443143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13261443143 is a deficient number, since it is larger than the sum of its proper divisors (1020111025).

13261443143 is a wasteful number, since it uses less digits than its factorization.

13261443143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020111024.

The product of its digits is 20736, while the sum is 32.

Adding to 13261443143 its reverse (34134416231), we get a palindrome (47395859374).

The spelling of 13261443143 in words is "thirteen billion, two hundred sixty-one million, four hundred forty-three thousand, one hundred forty-three".