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8155 = 57233
BaseRepresentation
bin1111111011011
3102012001
41333123
5230110
6101431
732530
oct17733
912161
108155
116144
124877
133934
142d87
15263a
hex1fdb

8155 has 8 divisors (see below), whose sum is σ = 11232. Its totient is φ = 5568.

The previous prime is 8147. The next prime is 8161. The reversal of 8155 is 5518.

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 8155 - 23 = 8147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82 + ... + 151.

It is an arithmetic number, because the mean of its divisors is an integer number (1404).

28155 is an apocalyptic number.

8155 is a deficient number, since it is larger than the sum of its proper divisors (3077).

8155 is a wasteful number, since it uses less digits than its factorization.

8155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its digits is 200, while the sum is 19.

The square root of 8155 is about 90.3050386191. The cubic root of 8155 is about 20.1283413302.

It can be divided in two parts, 815 and 5, that added together give a triangular number (820 = T40).

The spelling of 8155 in words is "eight thousand, one hundred fifty-five".

Divisors: 1 5 7 35 233 1165 1631 8155