50513209 has 2 divisors, whose sum is σ = 50513210. Its totient is φ = 50513208.

The previous prime is 50513201. The next prime is 50513227. The reversal of 50513209 is 90231505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38402809 + 12110400 = 6197^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 50513209 - 2³ = 50513201 is a prime.

It is not a weakly prime, because it can be changed into another prime (50513201) 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, 25256604 + 25256605.

It is an arithmetic number, because the mean of its divisors is an integer number (25256605).

Almost surely, 2^50513209 is an apocalyptic number.

It is an amenable number.

50513209 is a deficient number, since it is larger than the sum of its proper divisors (1).

50513209 is an equidigital number, since it uses as much as digits as its factorization.

50513209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 50513209 is about 7107.2645230074. The cubic root of 50513209 is about 369.6593138669.

The spelling of 50513209 in words is "fifty million, five hundred thirteen thousand, two hundred nine".