200430521 has 2 divisors, whose sum is σ = 200430522. Its totient is φ = 200430520.

The previous prime is 200430499. The next prime is 200430539. The reversal of 200430521 is 125034002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187005625 + 13424896 = 13675^2 + 3664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200430521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200430521.

It is not a weakly prime, because it can be changed into another prime (200430121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100215260 + 100215261.

It is an arithmetic number, because the mean of its divisors is an integer number (100215261).

Almost surely, 2^200430521 is an apocalyptic number.

It is an amenable number.

200430521 is a deficient number, since it is larger than the sum of its proper divisors (1).

200430521 is an equidigital number, since it uses as much as digits as its factorization.

200430521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 200430521 is about 14157.3486571462. The cubic root of 200430521 is about 585.2228639258. Note that the first 3 decimals are identical.

Adding to 200430521 its reverse (125034002), we get a palindrome (325464523).

The spelling of 200430521 in words is "two hundred million, four hundred thirty thousand, five hundred twenty-one".