55245 has 16 divisors (see below), whose sum is σ = 92160. Its totient is φ = 28224.

The previous prime is 55243. The next prime is 55249. The reversal of 55245 is 54255.

It is not a de Polignac number, because 55245 - 2¹ = 55243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243) 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 15 ways as a sum of consecutive naturals, for example, 372 + ... + 498.

It is an arithmetic number, because the mean of its divisors is an integer number (5760).

It is a Poulet number, since it divides 2⁵⁵²⁴⁴-1.

2⁵⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

55245 is a deficient number, since it is larger than the sum of its proper divisors (36915).

55245 is a wasteful number, since it uses less digits than its factorization.

55245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164.

The product of its digits is 1000, while the sum is 21.

The square root of 55245 is about 235.0425493395. The cubic root of 55245 is about 38.0859090499.

Subtracting from 55245 its product of digits (1000), we obtain a palindrome (54245).

Subtracting from 55245 its reverse (54255), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 55 and 245, that added together give a triangular number (300 = T₂₄).

The spelling of 55245 in words is "fifty-five thousand, two hundred forty-five".