200044421 has 2 divisors, whose sum is σ = 200044422. Its totient is φ = 200044420.

The previous prime is 200044391. The next prime is 200044441. The reversal of 200044421 is 124440002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102232321 + 97812100 = 10111^2 + 9890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200044421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200044421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200044441) 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, 100022210 + 100022211.

It is an arithmetic number, because the mean of its divisors is an integer number (100022211).

Almost surely, 2^200044421 is an apocalyptic number.

It is an amenable number.

200044421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200044421 is an equidigital number, since it uses as much as digits as its factorization.

200044421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 200044421 is about 14143.7060560519. The cubic root of 200044421 is about 584.8468403682.

Adding to 200044421 its reverse (124440002), we get a palindrome (324484423).

The spelling of 200044421 in words is "two hundred million, forty-four thousand, four hundred twenty-one".