55647 has 12 divisors (see below), whose sum is σ = 83720. Its totient is φ = 36936.

The previous prime is 55639. The next prime is 55661. The reversal of 55647 is 74655.

It is not a de Polignac number, because 55647 - 2³ = 55639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 3 and base 9.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 55647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129 + ... + 357.

2⁵⁵⁶⁴⁷ is an apocalyptic number.

55647 is a deficient number, since it is larger than the sum of its proper divisors (28073).

55647 is an equidigital number, since it uses as much as digits as its factorization.

55647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 232 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 55647 is about 235.8961635975. The cubic root of 55647 is about 38.1780654939.

The spelling of 55647 in words is "fifty-five thousand, six hundred forty-seven".