200540521 has 4 divisors (see below), whose sum is σ = 201264772. Its totient is φ = 199816272.

The previous prime is 200540503. The next prime is 200540531. The reversal of 200540521 is 125045002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26010000 + 174530521 = 5100^2 + 13211^2 .

It is a cyclic number.

It is not a de Polignac number, because 200540521 - 2²⁷ = 66322793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200540531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361710 + ... + 362263.

It is an arithmetic number, because the mean of its divisors is an integer number (50316193).

Almost surely, 2^200540521 is an apocalyptic number.

It is an amenable number.

200540521 is a deficient number, since it is larger than the sum of its proper divisors (724251).

200540521 is an equidigital number, since it uses as much as digits as its factorization.

200540521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724250.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 200540521 is about 14161.2330324728. The cubic root of 200540521 is about 585.3299047458.

Adding to 200540521 its reverse (125045002), we get a palindrome (325585523).

The spelling of 200540521 in words is "two hundred million, five hundred forty thousand, five hundred twenty-one".