55230209 has 2 divisors, whose sum is σ = 55230210. Its totient is φ = 55230208.

The previous prime is 55230173. The next prime is 55230247. The reversal of 55230209 is 90203255.

55230209 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., 32809984 + 22420225 = 5728^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 55230209 - 2¹² = 55226113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55230289) 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, 27615104 + 27615105.

It is an arithmetic number, because the mean of its divisors is an integer number (27615105).

Almost surely, 2^55230209 is an apocalyptic number.

It is an amenable number.

55230209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55230209 is an equidigital number, since it uses as much as digits as its factorization.

55230209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 55230209 is about 7431.7029676919. The cubic root of 55230209 is about 380.8250977422.

The spelling of 55230209 in words is "fifty-five million, two hundred thirty thousand, two hundred nine".