13504555243 has 4 divisors (see below), whose sum is σ = 13643777560. Its totient is φ = 13365332928.

The previous prime is 13504555199. The next prime is 13504555289. The reversal of 13504555243 is 34255540531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34255540531 = 31039 ⋅1103629.

It is a cyclic number.

It is not a de Polignac number, because 13504555243 - 2¹³ = 13504547051 is a prime.

It is a super-2 number, since 2×13504555243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13504555643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69611013 + ... + 69611206.

It is an arithmetic number, because the mean of its divisors is an integer number (3410944390).

Almost surely, 2^13504555243 is an apocalyptic number.

13504555243 is a deficient number, since it is larger than the sum of its proper divisors (139222317).

13504555243 is an equidigital number, since it uses as much as digits as its factorization.

13504555243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139222316.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 13504555243 in words is "thirteen billion, five hundred four million, five hundred fifty-five thousand, two hundred forty-three".