13801559 has 4 divisors (see below), whose sum is σ = 13825200. Its totient is φ = 13777920.

The previous prime is 13801523. The next prime is 13801561. The reversal of 13801559 is 95510831.

13801559 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13801559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13801589) 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, 10922 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (3456300).

Almost surely, 2^13801559 is an apocalyptic number.

13801559 is a deficient number, since it is larger than the sum of its proper divisors (23641).

13801559 is an equidigital number, since it uses as much as digits as its factorization.

13801559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23640.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 13801559 is about 3715.0449526217. The cubic root of 13801559 is about 239.8700627659.

The spelling of 13801559 in words is "thirteen million, eight hundred one thousand, five hundred fifty-nine".