Numbers 310,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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312,325

[Math.]  A printer’s error number: 312325 = 312325 = 312×325.

It is still true for 0’s added to the right side of the number. (by D. L. Vanderpool, References [17])

 

314,159

[Math.]  A prime number, formed by the first 6 digits of the number pi, p = 3.141 592 653…

 

314,721

[Math.]  Sum of the first 33 cube numbers: 

13+23+…+323+333 = 314,721 = (1+2+…+32+33)2 = 5612.

 

314,821

[Math.]  A Carmichael number: 314,821 = 13×61×397.

 

317,811

[Math.]  The 28th Fibonacci number.

 

318,682

[Math.]  101,558,217,124 = (101,558+217124)2 = 318,6822 and

464,194,217,124 = (464194+217124)2 = 681,3182 and 318682+681318 = 1,000,000.

 

319,225

[Math.]  (454+545 = 999 = 434+565)

4542 = 206,116 & 206+116 = 322

5452 = 297,025 & 297+025 = 322

and

4342 = 188,356 & 188+356 = 544

5652 = 319,225 & 319+225 = 544.

 

319,550

[Math.]  A pair of amicable numbers (319550, 430402).

 

319,993

[Math.]  Circular prime numbers: all 6 numbers 199933, 999331, 993319, 933199, 331999 and 319993 are prime.