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BaseRepresentation
bin100010010011
310000022
4202103
532240
614055
76254
oct4223
93008
102195
111716
12132b
13ccb
14b2b
159b5
hex893

2195 has 4 divisors (see below), whose sum is σ = 2640. Its totient is φ = 1752.

The previous prime is 2179. The next prime is 2203. The reversal of 2195 is 5912.

2195 = T24 + T25 + ... + T29.

2195 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 2195 - 24 = 2179 is a prime.

2195 is an undulating number in base 14.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215 + ... + 224.

It is an arithmetic number, because the mean of its divisors is an integer number (660).

22195 is an apocalyptic number.

2195 is a deficient number, since it is larger than the sum of its proper divisors (445).

2195 is an equidigital number, since it uses as much as digits as its factorization.

2195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 90, while the sum is 17.

The square root of 2195 is about 46.8508271005. The cubic root of 2195 is about 12.9960540292.

The spelling of 2195 in words is "two thousand, one hundred ninety-five".

Divisors: 1 5 439 2195