133 = 7 x 19.
133 has a unique representation as a sum of three squares: 133 = 42 + 62 + 92.
133 is 111 in base 11.
The reversal of 133 is prime (331). Note that 133.335 is the Dewey Decimal classification for numerology. If you reverse it, and add: 133.335 + 533.331, you'll discover the beast number, repeated!
133 is the smallest positive integer, n, for which the integer 10n + 5 is divisible by both 3 and 5 and for which none of the integers 10n + 1, 10n + 3, 10n + 7, and 10n + 9 are prime.
133 is an octagonal number.
It takes 133 years before the same phases of the moon occur on the same day of the year and also the same day of the week.
Source: Prime Curios!
The reversal of 133 is prime (331). Note that 133.335 is the Dewey Decimal classification for numerology. If you reverse it, and add: 133.335 + 533.331, you'll discover the beast number, repeated!
133 is the smallest positive integer, n, for which the integer 10n + 5 is divisible by both 3 and 5 and for which none of the integers 10n + 1, 10n + 3, 10n + 7, and 10n + 9 are prime.
133 is an octagonal number.
It takes 133 years before the same phases of the moon occur on the same day of the year and also the same day of the week.
Source: Prime Curios!
