13243245563 has 4 divisors (see below), whose sum is σ = 13330949328. Its totient is φ = 13155541800.

The previous prime is 13243245553. The next prime is 13243245581. The reversal of 13243245563 is 36554234231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36554234231 = 11213 ⋅3259987.

It is a cyclic number.

It is not a de Polignac number, because 13243245563 - 2¹⁸ = 13242983419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13243245503) 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, 43851656 + ... + 43851957.

It is an arithmetic number, because the mean of its divisors is an integer number (3332737332).

Almost surely, 2^13243245563 is an apocalyptic number.

13243245563 is a deficient number, since it is larger than the sum of its proper divisors (87703765).

13243245563 is an equidigital number, since it uses as much as digits as its factorization.

13243245563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87703764.

The product of its digits is 259200, while the sum is 38.

Adding to 13243245563 its reverse (36554234231), we get a palindrome (49797479794).

The spelling of 13243245563 in words is "thirteen billion, two hundred forty-three million, two hundred forty-five thousand, five hundred sixty-three".