51586 has 4 divisors (see below), whose sum is σ = 77382. Its totient is φ = 25792.

The previous prime is 51581. The next prime is 51593. The reversal of 51586 is 68515.

51586 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50625 + 961 = 225^2 + 31^2 .

It is a super-2 number, since 2×51586² = 5322230792, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 51586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51581) by changing a digit.

51586 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12895 + ... + 12898.

2⁵¹⁵⁸⁶ is an apocalyptic number.

51586 is a deficient number, since it is larger than the sum of its proper divisors (25796).

51586 is a wasteful number, since it uses less digits than its factorization.

51586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25795.

The product of its digits is 1200, while the sum is 25.

The square root of 51586 is about 227.1255159598. The cubic root of 51586 is about 37.2257924185.

The spelling of 51586 in words is "fifty-one thousand, five hundred eighty-six".