31101

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+5).at n=12A015865
• 4-Smith numbers.at n=33A103125
• Greater of number pair whose squares are reversals of each other, with no leading zeros allowed.at n=39A106324
• Numbers k such that k mod (2, 3, 4, ... , i+1) = (d_i, d_i-1, ..., d_1), where d_1, d_2, ..., d_i are the digits of k, with MSD(k) = d_1 and LSD(k) = d_i.at n=7A319599