18255 has 8 divisors (see below), whose sum is σ = 29232. Its totient is φ = 9728.

The previous prime is 18253. The next prime is 18257. The reversal of 18255 is 55281.

Added to its reverse (55281) it gives a triangular number (73536 = T₃₈₃).

It is an interprime number because it is at equal distance from previous prime (18253) and next prime (18257).

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

It is a cyclic number.

It is not a de Polignac number, because 18255 - 2¹ = 18253 is a prime.

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 18255.

It is not an unprimeable number, because it can be changed into a prime (18251) 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, 594 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (3654).

2¹⁸²⁵⁵ is an apocalyptic number.

18255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18255 is a deficient number, since it is larger than the sum of its proper divisors (10977).

18255 is a wasteful number, since it uses less digits than its factorization.

18255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225.

The product of its digits is 400, while the sum is 21.

The square root of 18255 is about 135.1110654240. Note that the first 3 decimals coincide. The cubic root of 18255 is about 26.3305913220.

Adding to 18255 its reverse (55281), we get a triangular number (73536 = T₃₈₃).

It can be divided in two parts, 1825 and 5, that added together give a triangular number (1830 = T₆₀).

The spelling of 18255 in words is "eighteen thousand, two hundred fifty-five".