51703

Appears in sequences

• Numbers k such that the sum of digits^3 of k equals Sum_{d|k, 1<d<k} d.at n=5A202279
• Numbers n such that sum of cubes of digits of n equals the sum of prime divisors of n.at n=22A217531
• a(n) = prime(n) * prime(2*n-1).at n=34A219603
• Numbers whose arithmetic derivative is equal to the sum of some fixed power of their digits.at n=10A269719
• Numbers k such that sigma(k) - k - 1 is a perfect number.at n=15A293992