200550561 has 4 divisors (see below), whose sum is σ = 267400752. Its totient is φ = 133700372.

The previous prime is 200550523. The next prime is 200550599. The reversal of 200550561 is 165055002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (200550523) and next prime (200550599).

It is a cyclic number.

It is not a de Polignac number, because 200550561 - 2¹⁷ = 200419489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200550061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33425091 + ... + 33425096.

It is an arithmetic number, because the mean of its divisors is an integer number (66850188).

Almost surely, 2^200550561 is an apocalyptic number.

It is an amenable number.

200550561 is a deficient number, since it is larger than the sum of its proper divisors (66850191).

200550561 is an equidigital number, since it uses as much as digits as its factorization.

200550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66850190.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 200550561 is about 14161.5875169417. The cubic root of 200550561 is about 585.3396727038.

The spelling of 200550561 in words is "two hundred million, five hundred fifty thousand, five hundred sixty-one".