51211

Appears in sequences

• Semiprimes for which both the sum and the product of the digits is also a semiprime.at n=40A118690
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 6.at n=56A136988
• Numbers k such that k and k^2 use only the digits 1, 2, 5 and 6.at n=16A137003
• Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 7.at n=47A137004
• Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 8.at n=31A137005
• Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 9.at n=29A137006
• Numbers with digital product = 10.at n=38A199990
• Composite numbers whose product of digits is 10.at n=32A201057
• Numbers k such that k + (sum of digits of k) and k + (product of digits of k) contain the same distinct digits of k.at n=31A248718
• Semiprimes such that sum of digits equals product of digits.at n=17A272436