553305509 has 2 divisors, whose sum is σ = 553305510. Its totient is φ = 553305508.

The previous prime is 553305491. The next prime is 553305521. The reversal of 553305509 is 905503355.

553305509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553284484 + 21025 = 23522^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553305509 is a prime.

It is a super-2 number, since 2×553305509² = 612293972579498162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553305539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276652754 + 276652755.

It is an arithmetic number, because the mean of its divisors is an integer number (276652755).

Almost surely, 2^553305509 is an apocalyptic number.

It is an amenable number.

553305509 is a deficient number, since it is larger than the sum of its proper divisors (1).

553305509 is an equidigital number, since it uses as much as digits as its factorization.

553305509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50625, while the sum is 35.

The square root of 553305509 is about 23522.4469177847. The cubic root of 553305509 is about 820.9593713807.

The spelling of 553305509 in words is "five hundred fifty-three million, three hundred five thousand, five hundred nine".