55285 has 4 divisors (see below), whose sum is σ = 66348. Its totient is φ = 44224.

The previous prime is 55259. The next prime is 55291. The reversal of 55285 is 58255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14884 + 40401 = 122^2 + 201^2 .

It is a cyclic number.

It is not a de Polignac number, because 55285 - 2⁹ = 54773 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5524 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (16587).

2⁵⁵²⁸⁵ is an apocalyptic number.

It is an amenable number.

55285 is a deficient number, since it is larger than the sum of its proper divisors (11063).

55285 is a wasteful number, since it uses less digits than its factorization.

55285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11062.

The product of its digits is 2000, while the sum is 25.

The square root of 55285 is about 235.1276249189. The cubic root of 55285 is about 38.0950988338.

The spelling of 55285 in words is "fifty-five thousand, two hundred eighty-five".