Strobogrammatic number Strobogrammatic number A strobogrammatic number is a number whose numeral is rotationally symmetric, so that it appears the same when rotated 180 degrees. In other words, the numeral looks the same right-side up and upside down (e.g., 69, 96, 1001). A strobogrammatic prime is a strobogrammatic number that is also a prime number, i.e., a number that is only divisible by one and itself (e.g., 11). It is a type of ambigram, words and numbers that retain their meaning when viewed from a different perspective, such as palindromes. When written using standard characters (ASCII), the numbers, 0, 1, 8 are
Infinity on High talents so compellingly, the album is regrettably haphazard." Caroline Sullivan of "The Guardian" believed that the album was overly sullen, but noted that "They may not be happy, but they haven't forgotten to be catchy." Barry Nicholson of "NME" found the amount of guest producers to be unnecessary and disliked some of the songs, but admired the album's "infectious" nature. "Infinity on High" was a major commercial success, debuting at number one on the US "Billboard" 200 chart, with first week sales of 260,000 copies in the United States, according to Nielsen SoundScan. "Infinity" has sold 1.4 million copies in