51587 has 4 divisors (see below), whose sum is σ = 52320. Its totient is φ = 50856.

The previous prime is 51581. The next prime is 51593. The reversal of 51587 is 78515.

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

It is an interprime number because it is at equal distance from previous prime (51581) and next prime (51593).

It is a cyclic number.

It is not a de Polignac number, because 51587 - 2¹² = 47491 is a prime.

It is a super-2 number, since 2×51587² = 5322437138, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51587.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (13080).

2⁵¹⁵⁸⁷ is an apocalyptic number.

51587 is a deficient number, since it is larger than the sum of its proper divisors (733).

51587 is an equidigital number, since it uses as much as digits as its factorization.

51587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 1400, while the sum is 26.

The square root of 51587 is about 227.1277173750. The cubic root of 51587 is about 37.2260329589.

The spelling of 51587 in words is "fifty-one thousand, five hundred eighty-seven".