55857 has 8 divisors (see below), whose sum is σ = 76384. Its totient is φ = 36288.

The previous prime is 55849. The next prime is 55871. The reversal of 55857 is 75855.

It is a happy number.

55857 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55857 - 2³ = 55849 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (55807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 345.

It is an arithmetic number, because the mean of its divisors is an integer number (9548).

2⁵⁵⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

55857 is a deficient number, since it is larger than the sum of its proper divisors (20527).

55857 is a wasteful number, since it uses less digits than its factorization.

55857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its digits is 7000, while the sum is 30.

The square root of 55857 is about 236.3408555455. The cubic root of 55857 is about 38.2260305206.

The spelling of 55857 in words is "fifty-five thousand, eight hundred fifty-seven".