200551 has 4 divisors (see below), whose sum is σ = 215992. Its totient is φ = 185112.

The previous prime is 200513. The next prime is 200569. The reversal of 200551 is 155002.

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 200551 - 2¹¹ = 198503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15427 = 200551 / (2 + 0 + 0 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7701 + ... + 7726.

It is an arithmetic number, because the mean of its divisors is an integer number (53998).

2²⁰⁰⁵⁵¹ is an apocalyptic number.

200551 is a deficient number, since it is larger than the sum of its proper divisors (15441).

200551 is a wasteful number, since it uses less digits than its factorization.

200551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 200551 is about 447.8292085159. The cubic root of 200551 is about 58.5340099801.

Adding to 200551 its reverse (155002), we get a palindrome (355553).

The spelling of 200551 in words is "two hundred thousand, five hundred fifty-one".