123,455,554,321

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Number

$123 \, 455 \, 554 \, 321$ is:

$11 \times 41 \times 73 \times 101 \times 137 \times 271$

A palindromic Smith number:

$1 + 2 + 3 + 4 + 5 + 5 + 5 + 5 + 4 + 3 + 2 + 1 = 40 = 1 + 1 + 4 + 1 + 7 + 3 + 1 + 0 + 1 + 1 + 3 + 7 + 2 + 7 + 1$

Also see

• Previous  ... Next: Palindromic Smith Number

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $12,345,554,321$