200001811 has 4 divisors (see below), whose sum is σ = 201836800. Its totient is φ = 198166824.

The previous prime is 200001797. The next prime is 200001827. The reversal of 200001811 is 118100002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200001811 - 2¹⁵ = 199969043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200001791 and 200001800.

It is not an unprimeable number, because it can be changed into a prime (200001211) 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, 917331 + ... + 917548.

It is an arithmetic number, because the mean of its divisors is an integer number (50459200).

Almost surely, 2^200001811 is an apocalyptic number.

200001811 is a deficient number, since it is larger than the sum of its proper divisors (1834989).

200001811 is a wasteful number, since it uses less digits than its factorization.

200001811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834988.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 200001811 is about 14142.1996521050. The cubic root of 200001811 is about 584.8053127693.

Adding to 200001811 its reverse (118100002), we get a palindrome (318101813).

The spelling of 200001811 in words is "two hundred million, one thousand, eight hundred eleven".