200036561 has 4 divisors (see below), whose sum is σ = 200434752. Its totient is φ = 199638372.

The previous prime is 200036549. The next prime is 200036563. The reversal of 200036561 is 165630002.

200036561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200036561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200036563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198341 + ... + 199346.

It is an arithmetic number, because the mean of its divisors is an integer number (50108688).

Almost surely, 2^200036561 is an apocalyptic number.

It is an amenable number.

200036561 is a deficient number, since it is larger than the sum of its proper divisors (398191).

200036561 is an equidigital number, since it uses as much as digits as its factorization.

200036561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398190.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 200036561 is about 14143.4281912130. The cubic root of 200036561 is about 584.8391804756.

Adding to 200036561 its reverse (165630002), we get a palindrome (365666563).

The spelling of 200036561 in words is "two hundred million, thirty-six thousand, five hundred sixty-one".