53450209 has 2 divisors, whose sum is σ = 53450210. Its totient is φ = 53450208.

The previous prime is 53450207. The next prime is 53450239. The reversal of 53450209 is 90205435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 20903184 = 5705^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 53450209 - 2¹ = 53450207 is a prime.

Together with 53450207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53450207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26725104 + 26725105.

It is an arithmetic number, because the mean of its divisors is an integer number (26725105).

Almost surely, 2^53450209 is an apocalyptic number.

It is an amenable number.

53450209 is a deficient number, since it is larger than the sum of its proper divisors (1).

53450209 is an equidigital number, since it uses as much as digits as its factorization.

53450209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 53450209 is about 7310.9649841864. The cubic root of 53450209 is about 376.6891714784.

The spelling of 53450209 in words is "fifty-three million, four hundred fifty thousand, two hundred nine".