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2159 = 17127
BaseRepresentation
bin100001101111
32221222
4201233
532114
613555
76203
oct4157
92858
102159
111693
1212bb
13ca1
14b03
1598e
hex86f

2159 has 4 divisors (see below), whose sum is σ = 2304. Its totient is φ = 2016.

The previous prime is 2153. The next prime is 2161. The reversal of 2159 is 9512.

It can be divided in two parts, 2 and 159, that added together give a palindrome (161).

2159 is nontrivially palindromic in base 3.

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 2159 - 24 = 2143 is a prime.

It is a super-2 number, since 2×21592 = 9322562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 127 = 2159 / (2 + 1 + 5 + 9).

It is a Duffinian number.

It is a plaindrome in base 6 and base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 80.

It is an arithmetic number, because the mean of its divisors is an integer number (576).

2159 is a deficient number, since it is larger than the sum of its proper divisors (145).

2159 is a wasteful number, since it uses less digits than its factorization.

2159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

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

The square root of 2159 is about 46.4650406220. The cubic root of 2159 is about 12.9246129853.

The spelling of 2159 in words is "two thousand, one hundred fifty-nine".

Divisors: 1 17 127 2159