200521 has 4 divisors (see below), whose sum is σ = 201600. Its totient is φ = 199444.

The previous prime is 200513. The next prime is 200569. The reversal of 200521 is 125002.

200521 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 125002 = 2 ⋅62501.

It is a cyclic number.

It is not a de Polignac number, because 200521 - 2³ = 200513 is a prime.

It is a Duffinian number.

200521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 200498 and 200507.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2²⁰⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

200521 is a deficient number, since it is larger than the sum of its proper divisors (1079).

200521 is an equidigital number, since it uses as much as digits as its factorization.

200521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 200521 is about 447.7957123511. The cubic root of 200521 is about 58.5310911750.

Adding to 200521 its reverse (125002), we get a palindrome (325523).

The spelling of 200521 in words is "two hundred thousand, five hundred twenty-one".