The Eyes Have it

In the past 17 years I made 45.148 photos. I'll be posting some of them here once in a while.

Thursday, October 05, 2006

The Great Joy

This is post 222 of The Eyes Have it. 05 oct 2006
222 (two hundred [and] twenty-two) is the natural number following 221 and preceding 223. It is a repdigit composite number, and its factorization makes it a sphenic number. It is also a Harshad number.
There is no solution to the equation x - É”(x) = 222, making 222 a noncototient. Nor is there, in base 10, an integer that added to the sum of its own digits yields 222, making 222 a self number.
Radii at 0° and approximately 222.49° divide a circle in the golden ratio.
The first triple repdigit in the square root of 222 is 222:
√222 =


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