2516209 has 2 divisors, whose sum is σ = 2516210. Its totient is φ = 2516208.

The previous prime is 2516201. The next prime is 2516233. The reversal of 2516209 is 9026152.

2516209 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., 1299600 + 1216609 = 1140^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516209 - 2³ = 2516201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2516201) 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, 1258104 + 1258105.

It is an arithmetic number, because the mean of its divisors is an integer number (1258105).

2^2516209 is an apocalyptic number.

It is an amenable number.

2516209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516209 is an equidigital number, since it uses as much as digits as its factorization.

2516209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2516209 is about 1586.2562844635. The cubic root of 2516209 is about 136.0135691478.

The spelling of 2516209 in words is "two million, five hundred sixteen thousand, two hundred nine".