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19165 = 53833
BaseRepresentation
bin100101011011101
3222021211
410223131
51103130
6224421
7106606
oct45335
928254
1019165
1113443
12b111
138953
146dad
155a2a
hex4add

19165 has 4 divisors (see below), whose sum is σ = 23004. Its totient is φ = 15328.

The previous prime is 19163. The next prime is 19181. The reversal of 19165 is 56191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56191 = 83677.

It can be written as a sum of positive squares in 2 ways, for example, as 5476 + 13689 = 74^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 19165 - 21 = 19163 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19163) 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, 1912 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (5751).

219165 is an apocalyptic number.

It is an amenable number.

19165 is a deficient number, since it is larger than the sum of its proper divisors (3839).

19165 is an equidigital number, since it uses as much as digits as its factorization.

19165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838.

The product of its digits is 270, while the sum is 22.

The square root of 19165 is about 138.4377116251. The cubic root of 19165 is about 26.7610371666.

It can be divided in two parts, 191 and 65, that added together give a 8-th power (256 = 28).

The spelling of 19165 in words is "nineteen thousand, one hundred sixty-five".

Divisors: 1 5 3833 19165