<PAGE>
FILE NO. 333-13649
RULE 424(B)(3)
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED MAY 16, 1997)
(TO PROSPECTUS SUPPLEMENT DATED MAY 16, 1997)
PROSPECTUS NUMBER: 1511
DATED: MAY 27, 1997
MERRILL LYNCH & CO., INC.
MEDIUM-TERM NOTES, SERIES B
DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
FLOATING RATE NOTES
<TABLE>
<CAPTION>
<S> <C>
BASE RATE: Prime (Prior Day H.15)
INDEX MATURITY: Daily
TRADE DATE: May 27, 1997
SETTLEMENT DATE: May 30, 1997
MATURITY DATE: June 1, 1998
REDEMPTION DATE: N/A
OPTIONAL REPAYMENT DATES: N/A
SPREAD: -2.810%
(minus two hundred eighty one bps)
SPREAD MULTIPLIER: N/A
MAXIMUM INTEREST RATE: N/A
MINIMUM INTEREST RATE: N/A
INTEREST RESET DATES: Daily
INTEREST PAYMENT DATES: The first of September, December, March and June
commencing September 1997 through Maturity, subject to
modified following business day convention.
INITIAL INTEREST RATE: 5.69%
FORM: Book-entry
</TABLE>