13243122447 has 4 divisors (see below), whose sum is σ = 17657496600. Its totient is φ = 8828748296.

The previous prime is 13243122439. The next prime is 13243122457. The reversal of 13243122447 is 74422134231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13243122447 - 2³ = 13243122439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243122457) 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, 2207187072 + ... + 2207187077.

It is an arithmetic number, because the mean of its divisors is an integer number (4414374150).

Almost surely, 2^13243122447 is an apocalyptic number.

13243122447 is a deficient number, since it is larger than the sum of its proper divisors (4414374153).

13243122447 is an equidigital number, since it uses as much as digits as its factorization.

13243122447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414374152.

The product of its digits is 32256, while the sum is 33.

Adding to 13243122447 its reverse (74422134231), we get a palindrome (87665256678).

The spelling of 13243122447 in words is "thirteen billion, two hundred forty-three million, one hundred twenty-two thousand, four hundred forty-seven".