2,200

[Calendar]  This year is a non-leap year, following the adoption of the current Gregorian calendar, created by Pope Gregory XIII in 1582 to reform the old Julian calendar.

 

[EECS]  2.2K(W) is one of standard numerical values for resistors (of tolerance class 5%).  2,200mF (microfarads) is one of standard numerical values for capacitors.

 

2,201

[Math.]  22013 = 10,662,526,601 is a palindromic number.

 

2,203

[Math.]  A prime number.  A Mersenne exponent: 22203–1 is the 16th Mersenne prime number.

 

2,207

[Math.]  A prime number.  The 16th Lucas number.

 

2,208

[Math.] 

23×64 = 1,472 = 32×46

23´96 = 2,208 = 32×69

64×69 = 4,416 = 96×46.

 

[Math.]  The 11th Keith number: 2, 2, 0, 8, 12, 22, 42, 84, 160, 308, 594, 1146, 2208, 4256…

 

2,211

[Math.]  A triangular number (sum of all integers from 1 to 66): 2211 = 1+2+…+65+66.

 

2,213

[Math.]  A prime number.  2213 = 23+23+133.

 

2,222

[Math.]  2,222 = 2×11×101 uses the smallest 1-digit, 2-digit and 3-digit prime numbers, respectively.

 

[Math.]  2,222 = 21+22+23+25+27+211.

 

[Math.]  All the cubic powers 23 = 8, 223 = 10,648, 2223 = 10,941,048, 22223 = 10,970,645,048, 22,2223 = 10,973,607,685,048 and 222,2223 = 10,973,903,978,085,048 do not use digits 2.

 

[Phone]  The number to key in text messaging on telephone keypad for number 2.

 

[Zip]  U.S. Postal Zip Code: Boston, Massachusetts 02222.

 

2,223

[Math.]  22232 = 4,941,729 and 0494+1729 = 2223.

 

2,240

[Measure]  1 long ton (or gross ton) = 20 long (gross) hundredweights = 2,240 lb (pounds) = 1016.0469 kg (kilograms).

1 short ton = 20 hundredweights = 2,000 lb (pounds) = 907.1847 kg (kilograms).

 

2,244

[Math.]  A number whose square and cube use different digits: 22442 = 5,035,536 and 22443 = 11,299,742,784.

 

2,250

[Math.]  2,250 = 21×32×53.

 

2,261

[Math.]  2261 = 2222+22+6+11.

 

2,263

[Math.]  2263 = 2222+2+6+33.

 

2,269

[Math.]  A prime number. 

 

2,275

[Math.]  2275 = 14+24+34+44+54+64.

 

2,278

[Math.]  A triangular number (sum of all integers from 1 to 67): 2145 = 1+2+…+66+67.

 

2,281

[Math.]  A prime number. A Mersenne exponent: 22281–1 is the 17th Mersenne prime number.