55243 has 2 divisors, whose sum is σ = 55244. Its totient is φ = 55242.

The previous prime is 55229. The next prime is 55249. The reversal of 55243 is 34255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55243 - 2¹³ = 47051 is a prime.

55243 is a lucky number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 55243.

It is not a weakly prime, because it can be changed into another prime (55249) 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 as a sum of consecutive naturals, namely, 27621 + 27622.

It is an arithmetic number, because the mean of its divisors is an integer number (27622).

2⁵⁵²⁴³ is an apocalyptic number.

55243 is a deficient number, since it is larger than the sum of its proper divisors (1).

55243 is an equidigital number, since it uses as much as digits as its factorization.

55243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 19.

The square root of 55243 is about 235.0382947522. The cubic root of 55243 is about 38.0854494443.

Adding to 55243 its reverse (34255), we get a palindrome (89498).

It can be divided in two parts, 552 and 43, that added together give a palindrome (595).

The spelling of 55243 in words is "fifty-five thousand, two hundred forty-three".