51873 has 4 divisors (see below), whose sum is σ = 69168. Its totient is φ = 34580.

The previous prime is 51871. The next prime is 51893. The reversal of 51873 is 37815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51873 - 2¹ = 51871 is a prime.

It is a D-number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (51871) 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, 8643 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (17292).

2⁵¹⁸⁷³ is an apocalyptic number.

It is an amenable number.

51873 is a deficient number, since it is larger than the sum of its proper divisors (17295).

51873 is a wasteful number, since it uses less digits than its factorization.

51873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17294.

The product of its digits is 840, while the sum is 24.

The square root of 51873 is about 227.7564488659. The cubic root of 51873 is about 37.2947003278.

The spelling of 51873 in words is "fifty-one thousand, eight hundred seventy-three".