13855 has 8 divisors (see below), whose sum is σ = 17712. Its totient is φ = 10368.

The previous prime is 13841. The next prime is 13859. The reversal of 13855 is 55831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(13855) divides (13855-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 13855 - 2¹¹ = 11807 is a prime.

It is a super-2 number, since 2×13855² = 383922050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 166.

It is an arithmetic number, because the mean of its divisors is an integer number (2214).

2¹³⁸⁵⁵ is an apocalyptic number.

13855 is a deficient number, since it is larger than the sum of its proper divisors (3857).

13855 is a wasteful number, since it uses less digits than its factorization.

13855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its digits is 600, while the sum is 22.

The square root of 13855 is about 117.7072640069. The cubic root of 13855 is about 24.0179264216.

It can be divided in two parts, 13 and 855, that added together give a palindrome (868).

The spelling of 13855 in words is "thirteen thousand, eight hundred fifty-five".