55869 has 8 divisors (see below), whose sum is σ = 81312. Its totient is φ = 33840.

The previous prime is 55849. The next prime is 55871. The reversal of 55869 is 96855.

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

It is not a de Polignac number, because 55869 - 2⁵ = 55837 is a prime.

It is a super-2 number, since 2×55869² = 6242690322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1693 = 55869 / (5 + 5 + 8 + 6 + 9).

55869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55819) 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, 814 + ... + 879.

It is an arithmetic number, because the mean of its divisors is an integer number (10164).

2⁵⁵⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

55869 is a deficient number, since it is larger than the sum of its proper divisors (25443).

55869 is a wasteful number, since it uses less digits than its factorization.

55869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its digits is 10800, while the sum is 33.

The square root of 55869 is about 236.3662412444. The cubic root of 55869 is about 38.2287677456.

The spelling of 55869 in words is "fifty-five thousand, eight hundred sixty-nine".