T W O H U N D R E D A N D F I F T Y O N E 20+23+15+08+21+14+04+18+05+04+01+14+04+06+09+06+20+25+15+14+05 = 251 If you don't include "an

T W O H U N D R E D A N D F I F T Y O N E 20+23+15+08+21+14+04+18+05+04+01+14+04+06+09+06+20+25+15+14+05 = 251 If you don't include "and" it's more interesting. I don't think there is an answer because the value of a number grows much faster (exponentially) than the value of its gematric sum (linearly), so once you've checked there's no example below some limit (one million is enough), there can't be any examples larger than that.