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A palindromic number is a number whose digits, with decimal representation usually assumed, are the same read backward, for example, 5885. They are studied in recreational mathematics where palindromic numbers with special properties are sought. A palindromic prime is a palindromic number that is a prime number, for example, 191 and 313.

A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward as forward, such as madam or racecar. Sentence-length palindromes may be written when allowances are made for adjustments to capital letters, punctuation, and word dividers. Aqui ficam alguns exemplos:

  • A nut for a jar of tuna.
  • Al lets Della call Ed “Stella”.
  • God lives, evil dog.
  • Borrow or rob?
  • Was it a car or a cat I saw?
  • Ed, I saw Harpo Marx ram Oprah W. aside.
  • Madam, in Eden, I’m Adam.
  • Murder for a jar of red rum.
  • No garden, one dragon.
  • Oozy rat in a sanitary zoo.
  • Yo, banana boy!
  • A car, a man, a maraca.
  • A man, a plan, a canal: Panama.
  • A Santa dog lived as a devil God at NASA.
  • A Toyota! Race fast, safe car! A Toyota!
  • Devil never even lived.
  • Marge lets Norah see Sharon’s telegram.
  • No, it never propagates if I set a gap or prevention
  • Norma is as selfless as I am, Ron.
  • If I had a hi-fi…
  • Stressed was I ere I saw desserts.
  • Red rum, sir, is murder.
  • Are we not pure? “No, sir!” Panama’s moody Noriega brags. “It is garbage!” Irony dooms a man—a prisoner up to new era.