200820561 has 8 divisors (see below), whose sum is σ = 269558400. Its totient is φ = 132981552.

The previous prime is 200820527. The next prime is 200820569. The reversal of 200820561 is 165028002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 200820561 - 2¹⁰ = 200819537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200820569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224185 + ... + 225078.

It is an arithmetic number, because the mean of its divisors is an integer number (33694800).

Almost surely, 2^200820561 is an apocalyptic number.

It is an amenable number.

200820561 is a deficient number, since it is larger than the sum of its proper divisors (68737839).

200820561 is a wasteful number, since it uses less digits than its factorization.

200820561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449415.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 200820561 is about 14171.1171401552. The cubic root of 200820561 is about 585.6022346571.

Adding to 200820561 its reverse (165028002), we get a palindrome (365848563).

The spelling of 200820561 in words is "two hundred million, eight hundred twenty thousand, five hundred sixty-one".