56851 has 4 divisors (see below), whose sum is σ = 57400. Its totient is φ = 56304.

The previous prime is 56843. The next prime is 56857. The reversal of 56851 is 15865.

56851 is nontrivially palindromic in base 6 and base 11.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 56851 - 2³ = 56843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66 + ... + 343.

It is an arithmetic number, because the mean of its divisors is an integer number (14350).

2⁵⁶⁸⁵¹ is an apocalyptic number.

56851 is a deficient number, since it is larger than the sum of its proper divisors (549).

56851 is a wasteful number, since it uses less digits than its factorization.

56851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548.

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

The square root of 56851 is about 238.4344773727. The cubic root of 56851 is about 38.4514483275.

The spelling of 56851 in words is "fifty-six thousand, eight hundred fifty-one".