55549 has 4 divisors (see below), whose sum is σ = 59836. Its totient is φ = 51264.

The previous prime is 55547. The next prime is 55579. The reversal of 55549 is 94555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94555 = 5 ⋅18911.

It can be written as a sum of positive squares in 2 ways, for example, as 11449 + 44100 = 107^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 55549 - 2¹ = 55547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55541) 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 3 ways as a sum of consecutive naturals, for example, 2124 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (14959).

2⁵⁵⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

55549 is a deficient number, since it is larger than the sum of its proper divisors (4287).

55549 is a wasteful number, since it uses less digits than its factorization.

55549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its digits is 4500, while the sum is 28.

The square root of 55549 is about 235.6883535519. The cubic root of 55549 is about 38.1556405118.

The spelling of 55549 in words is "fifty-five thousand, five hundred forty-nine".