55243313 has 2 divisors, whose sum is σ = 55243314. Its totient is φ = 55243312.

The previous prime is 55243301. The next prime is 55243337. The reversal of 55243313 is 31334255.

55243313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40551424 + 14691889 = 6368^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 55243313 - 2²⁰ = 54194737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55243213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27621656 + 27621657.

It is an arithmetic number, because the mean of its divisors is an integer number (27621657).

Almost surely, 2^55243313 is an apocalyptic number.

It is an amenable number.

55243313 is a deficient number, since it is larger than the sum of its proper divisors (1).

55243313 is an equidigital number, since it uses as much as digits as its factorization.

55243313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 26.

The square root of 55243313 is about 7432.5845437506. The cubic root of 55243313 is about 380.8552137334.

Adding to 55243313 its reverse (31334255), we get a palindrome (86577568).

The spelling of 55243313 in words is "fifty-five million, two hundred forty-three thousand, three hundred thirteen".