51287 has 2 divisors, whose sum is σ = 51288.
Its totient is φ = 51286.
The previous prime is 51283. The next prime is 51307. The reversal of 51287 is 78215.
It can be divided in two parts, 512 and 87, that multiplied together give a palindrome (44544).
51287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 51287 - 22 = 51283 is a prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51287.
It is not a weakly prime, because it can be changed into another prime (51283) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25643 + 25644.
It is an arithmetic number, because the mean of its divisors is an integer number (25644).
251287 is an apocalyptic number.
51287 is a deficient number, since it is larger than the sum of its proper divisors (1).
51287 is an equidigital number, since it uses as much as digits as its factorization.
51287 is an evil number, because the sum of its binary digits is even.
The product of its digits is 560, while the sum is 23.
The square root of 51287 is about 226.4663330387.
The cubic root of 51287 is about 37.1537309668.
The spelling of 51287 in words is "fifty-one thousand, two hundred eighty-seven".