13255821847 has 4 divisors (see below), whose sum is σ = 13259992216. Its totient is φ = 13251651480.

The previous prime is 13255821841. The next prime is 13255821881. The reversal of 13255821847 is 74812855231.

It is a happy number.

13255821847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74812855231 = 89 ⋅840593879.

It is a cyclic number.

It is not a de Polignac number, because 13255821847 - 2²³ = 13247433239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13255821797 and 13255821806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13255821841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080413 + ... + 2086774.

It is an arithmetic number, because the mean of its divisors is an integer number (3314998054).

Almost surely, 2^13255821847 is an apocalyptic number.

13255821847 is a deficient number, since it is larger than the sum of its proper divisors (4170369).

13255821847 is an equidigital number, since it uses as much as digits as its factorization.

13255821847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170368.

The product of its digits is 537600, while the sum is 46.

The spelling of 13255821847 in words is "thirteen billion, two hundred fifty-five million, eight hundred twenty-one thousand, eight hundred forty-seven".