Is 2201 really the only non-palindromic number whose cube is palindromic?
Hі,
Wikipedia states that 2201 is the "only known non-palindromic number whose cube is palindromic", and lists no reference. It is in fact true that $2201^3=10662526601$, which is a palindrome. But to say there isn't any other number with this property seems a rather bold statement. Is this provable?
Thanks,
A short computer run will verify this is true for all $n$ smaller than (updated) $10^{11}$.
import math,sys
def isPali(n): return str(n)[::-1] == str(n)
n = 0
try:
while True:
n += 1
if not isPali(n) and isPali(n*n*n): print 'Found one!',n, n*n*n
except KeyboardInterrupt:
print 'Searched until', n
sys.exit()
Anyone with more computing time is welcome to add some powers to that $10$.