200536561 has 4 divisors (see below), whose sum is σ = 203529712. Its totient is φ = 197543412.

The previous prime is 200536529. The next prime is 200536603. The reversal of 200536561 is 165635002.

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 not a de Polignac number, because 200536561 - 2⁵ = 200536529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200536961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496475 + ... + 1496608.

It is an arithmetic number, because the mean of its divisors is an integer number (50882428).

Almost surely, 2^200536561 is an apocalyptic number.

It is an amenable number.

200536561 is a deficient number, since it is larger than the sum of its proper divisors (2993151).

200536561 is an equidigital number, since it uses as much as digits as its factorization.

200536561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993150.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 200536561 is about 14161.0932134493. The cubic root of 200536561 is about 585.3260519556.

The spelling of 200536561 in words is "two hundred million, five hundred thirty-six thousand, five hundred sixty-one".