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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 53 (number) ： ウィキペディア英語版 53 (number) 53 (fifty-three) is the natural number following 52 and preceding 54. ==In mathematics== Fifty-three is the 16th prime number. It is also an Eisenstein prime, and a Sophie Germain prime. The sum of the first 53 primes is 5830, which is divisible by 53, a property shared by few other numbers.〔(Puzzle 31.- The Average Prime number, APN(k) = S(Pk)/k ) from The Prime Puzzles & Problems Connection website〕 53 written in hexadecimal is 35, that is, the same characters used in the decimal representation, but reversed. Four multiples of 53 share this property: 371 = , 5141 = , 99481 = , and 8520280 = , and these are the only numbers that do. 53 cannot be expressed as the sum of any integer and its base-10 digits, making 53 a self number. 53 is the smallest prime number that does not divide the order of any sporadic group. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「53 (number)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.