200550509 has 2 divisors, whose sum is σ = 200550510. Its totient is φ = 200550508.

The previous prime is 200550487. The next prime is 200550523. The reversal of 200550509 is 905055002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 57078025 = 11978^2 + 7555^2 .

It is a cyclic number.

It is not a de Polignac number, because 200550509 - 2¹² = 200546413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200550599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100275254 + 100275255.

It is an arithmetic number, because the mean of its divisors is an integer number (100275255).

Almost surely, 2^200550509 is an apocalyptic number.

It is an amenable number.

200550509 is a deficient number, since it is larger than the sum of its proper divisors (1).

200550509 is an equidigital number, since it uses as much as digits as its factorization.

200550509 is an odious number, because the sum of its binary digits is odd.

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

The square root of 200550509 is about 14161.5856809893. The cubic root of 200550509 is about 585.3396221137.

The spelling of 200550509 in words is "two hundred million, five hundred fifty thousand, five hundred nine".