13123044243 has 72 divisors (see below), whose sum is σ = 21708479520. Its totient is φ = 7603115520.

The previous prime is 13123044173. The next prime is 13123044257. The reversal of 13123044243 is 34244032131.

13123044243 is a `hidden beast` number, since 1 + 3 + 1 + 230 + 4 + 424 + 3 = 666.

It is not a de Polignac number, because 13123044243 - 2²⁵ = 13089489811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123044293) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2344378 + ... + 2349968.

It is an arithmetic number, because the mean of its divisors is an integer number (301506660).

Almost surely, 2^13123044243 is an apocalyptic number.

13123044243 is a deficient number, since it is larger than the sum of its proper divisors (8585435277).

13123044243 is a wasteful number, since it uses less digits than its factorization.

13123044243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5663 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 13123044243 its reverse (34244032131), we get a palindrome (47367076374).

The spelling of 13123044243 in words is "thirteen billion, one hundred twenty-three million, forty-four thousand, two hundred forty-three".