5216209 has 2 divisors, whose sum is σ = 5216210. Its totient is φ = 5216208.

The previous prime is 5216191. The next prime is 5216213. The reversal of 5216209 is 9026125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 1830609 = 1840^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 5216209 - 2¹¹ = 5214161 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5216219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608104 + 2608105.

It is an arithmetic number, because the mean of its divisors is an integer number (2608105).

Almost surely, 2^5216209 is an apocalyptic number.

It is an amenable number.

5216209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216209 is an equidigital number, since it uses as much as digits as its factorization.

5216209 is an evil number, because the sum of its binary digits is even.

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

The square root of 5216209 is about 2283.9021432627. The cubic root of 5216209 is about 173.4276455024.

It can be divided in two parts, 52 and 16209, that added together give a palindrome (16261).

The spelling of 5216209 in words is "five million, two hundred sixteen thousand, two hundred nine".