55550 has 24 divisors (see below), whose sum is σ = 113832. Its totient is φ = 20000.

The previous prime is 55547. The next prime is 55579. The reversal of 55550 is 5555.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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, 500 + ... + 600.

It is an arithmetic number, because the mean of its divisors is an integer number (4743).

2⁵⁵⁵⁵⁰ is an apocalyptic number.

55550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55550 is an abundant number, since it is smaller than the sum of its proper divisors (58282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56916).

55550 is a wasteful number, since it uses less digits than its factorization.

55550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 55550 is about 235.6904749879. The cubic root of 55550 is about 38.1558694713.

It can be divided in two parts, 5 and 5550, that added together give a palindrome (5555).

The spelling of 55550 in words is "fifty-five thousand, five hundred fifty".