5505209 has 2 divisors, whose sum is σ = 5505210. Its totient is φ = 5505208.

The previous prime is 5505191. The next prime is 5505217. The reversal of 5505209 is 9025055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4644025 + 861184 = 2155^2 + 928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5505209 is a prime.

It is a super-2 number, since 2×5505209² = 60614652267362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5505239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752604 + 2752605.

It is an arithmetic number, because the mean of its divisors is an integer number (2752605).

Almost surely, 2^5505209 is an apocalyptic number.

It is an amenable number.

5505209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505209 is an equidigital number, since it uses as much as digits as its factorization.

5505209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 5505209 is about 2346.3181796167. The cubic root of 5505209 is about 176.5731251966.

The spelling of 5505209 in words is "five million, five hundred five thousand, two hundred nine".