200581 has 4 divisors (see below), whose sum is σ = 203200. Its totient is φ = 197964.

The previous prime is 200579. The next prime is 200587. The reversal of 200581 is 185002.

It is a happy number.

200581 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 not a de Polignac number, because 200581 - 2¹ = 200579 is a prime.

It is a super-2 number, since 2×200581² = 80465475122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200587) 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, 1191 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (50800).

2²⁰⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

200581 is a deficient number, since it is larger than the sum of its proper divisors (2619).

200581 is an equidigital number, since it uses as much as digits as its factorization.

200581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 200581 is about 447.8627021756. The cubic root of 200581 is about 58.5369284942.

Adding to 200581 its product of nonzero digits (80), we get a triangular number (200661 = T₆₃₃).

Adding to 200581 its reverse (185002), we get a palindrome (385583).

The spelling of 200581 in words is "two hundred thousand, five hundred eighty-one".