281 (number)
281 is the 60th prime, twin prime with 283, Sophie Germain prime, sum of the first fourteen primes, sum of seven consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53), Chen prime, Eisenstein prime with no imaginary part, centered decagonal number. 281 is the smallest prime p such that the decimal period length of the reciprocal of p is (p−1)/10, i.e. the period length of 1/281 is 28. However, in binary, it has period length 70. The generalized repunit number is composite for all prime p < 60000. NANP telephone area code 281 is an overlay code serving Houston, Texas, and its environs.
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281 (number)
281 is the 60th prime, twin prime with 283, Sophie Germain prime, sum of the first fourteen primes, sum of seven consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53), Chen prime, Eisenstein prime with no imaginary part, centered decagonal number. 281 is the smallest prime p such that the decimal period length of the reciprocal of p is (p−1)/10, i.e. the period length of 1/281 is 28. However, in binary, it has period length 70. The generalized repunit number is composite for all prime p < 60000. NANP telephone area code 281 is an overlay code serving Houston, Texas, and its environs.
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281 is the 60th prime, twin pr ...... ston, Texas, and its environs.
@en
281 är det naturliga talet som följer 280 och som följs av 282.
@sv
281 هو عدد صحيح طبيعي بين 280 و 282
@ar
281(이백팔십일)은 280보다 크고 282보다 작은 자연수이다.
@ko
281是280與282之間的自然數。
@zh
281(二百八十一、にひゃくはちじゅういち)は自然数、また整数において、280の次で282の前の数である。
@ja
Berrehun eta laurogeita bat (2 ...... aurretik doan zenbaki osoa da.
@eu
Duecentottantuno (281) è il numero naturale dopo il 280 e prima del 282.
@it
Dvě stě osmdesát jedna je přir ...... číslicemi se zapisuje CCLXXXI.
@cs
Το 281 (διακόσια ογδόντα ένα) είναι φυσικός αριθμός μετά το 280 και πριν το 282.
@el
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281 is the 60th prime, twin pr ...... ston, Texas, and its environs.
@en
281 är det naturliga talet som följer 280 och som följs av 282.
@sv
281 هو عدد صحيح طبيعي بين 280 و 282
@ar
281(이백팔십일)은 280보다 크고 282보다 작은 자연수이다.
@ko
281是280與282之間的自然數。
@zh
281(二百八十一、にひゃくはちじゅういち)は自然数、また整数において、280の次で282の前の数である。
@ja
Berrehun eta laurogeita bat (2 ...... aurretik doan zenbaki osoa da.
@eu
Duecentottantuno (281) è il numero naturale dopo il 280 e prima del 282.
@it
Dvě stě osmdesát jedna je přir ...... číslicemi se zapisuje CCLXXXI.
@cs
Το 281 (διακόσια ογδόντα ένα) είναι φυσικός αριθμός μετά το 280 και πριν το 282.
@el
label
281 (number)
@en
281 (numero)
@it
281 (tal)
@sv
281 (číslo)
@cs
281 (αριθμός)
@el
281 (عدد)
@ar
281
@ja
281
@ko
281
@zh
Berrehun eta laurogeita bat
@eu