552521909 has 2 divisors, whose sum is σ = 552521910. Its totient is φ = 552521908.

The previous prime is 552521861. The next prime is 552521911. The reversal of 552521909 is 909125255.

552521909 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., 299393809 + 253128100 = 17303^2 + 15910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-552521909 is a prime.

Together with 552521911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (552521969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276260954 + 276260955.

It is an arithmetic number, because the mean of its divisors is an integer number (276260955).

Almost surely, 2^552521909 is an apocalyptic number.

It is an amenable number.

552521909 is a deficient number, since it is larger than the sum of its proper divisors (1).

552521909 is an equidigital number, since it uses as much as digits as its factorization.

552521909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 552521909 is about 23505.7845859269. The cubic root of 552521909 is about 820.5716364086.

The spelling of 552521909 in words is "five hundred fifty-two million, five hundred twenty-one thousand, nine hundred nine".