51427

Properties

Appears in sequences

• Numbers n such that the number formed by the digits of 2n sorted in ascending order is equal to the sum of the divisors of n after the digits of each divisor have been sorted in ascending order.at n=14A083387
• Number of partitions of primes into mutual coprimes > 1.at n=41A086191
• Primes p such that the largest prime factor of p^5 + 1 is less than p.at n=15A102327
• Number of 2 X 2 nonsingular 0..n matrices with rows in increasing order.at n=16A183761
• Primes p for which exactly six bases b with 1 < b < p exist such that p is a base b Wieferich prime.at n=2A255209
• a(n) is the least odd prime not in A001359 such that all subsequent composites in the gap up to the next prime have at least n distinct prime factors.at n=3A359636
• For n >= 1, a(n) is the least prime p such that the arithmetic mean of (n + 1) consecutive primes starting with p is a perfect square, or a(n) = -1 if no such p exists.at n=24A365706
• Integers k such that k + 1 has a divisor that is an anagram of k, which must have the same number of digits as k.at n=17A384597
• Prime numbersat n=5261