13655 has 4 divisors (see below), whose sum is σ = 16392. Its totient is φ = 10920.

The previous prime is 13649. The next prime is 13669. The reversal of 13655 is 55631.

13655 = 5² + 6² + ... + 34².

13655 is nontrivially palindromic in base 4 and base 7.

13655 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13655 - 2⁶ = 13591 is a prime.

It is an Ulam number.

It is a Duffinian number.

13655 is an undulating number in base 7.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 13655.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (4098).

2¹³⁶⁵⁵ is an apocalyptic number.

13655 is a deficient number, since it is larger than the sum of its proper divisors (2737).

13655 is an equidigital number, since it uses as much as digits as its factorization.

13655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its digits is 450, while the sum is 20.

The square root of 13655 is about 116.8546105209. The cubic root of 13655 is about 23.9017978025.

It can be divided in two parts, 136 and 55, that added together give a palindrome (191).

The spelling of 13655 in words is "thirteen thousand, six hundred fifty-five".