27550 has 24 divisors (see below), whose sum is σ = 55800. Its totient is φ = 10080.

The previous prime is 27541. The next prime is 27551. The reversal of 27550 is 5572.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 936 + ... + 964.

It is an arithmetic number, because the mean of its divisors is an integer number (2325).

2²⁷⁵⁵⁰ is an apocalyptic number.

27550 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (27900).

27550 is a wasteful number, since it uses less digits than its factorization.

27550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 27550 is about 165.9819267270. The cubic root of 27550 is about 30.2023359742.

It can be divided in two parts, 275 and 50, that added together give a triangular number (325 = T₂₅).

The spelling of 27550 in words is "twenty-seven thousand, five hundred fifty".