13500320243 has 2 divisors, whose sum is σ = 13500320244. Its totient is φ = 13500320242.

The previous prime is 13500320221. The next prime is 13500320311. The reversal of 13500320243 is 34202300531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13500320243 - 2⁶ = 13500320179 is a prime.

It is not a weakly prime, because it can be changed into another prime (13500320213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750160121 + 6750160122.

It is an arithmetic number, because the mean of its divisors is an integer number (6750160122).

Almost surely, 2^13500320243 is an apocalyptic number.

13500320243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13500320243 is an equidigital number, since it uses as much as digits as its factorization.

13500320243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 13500320243 its reverse (34202300531), we get a palindrome (47702620774).

The spelling of 13500320243 in words is "thirteen billion, five hundred million, three hundred twenty thousand, two hundred forty-three".