200143421 has 2 divisors, whose sum is σ = 200143422. Its totient is φ = 200143420.

The previous prime is 200143387. The next prime is 200143441. The reversal of 200143421 is 124341002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 15319396 = 13595^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 200143421 - 2⁶ = 200143357 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 200143421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200143441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100071710 + 100071711.

It is an arithmetic number, because the mean of its divisors is an integer number (100071711).

Almost surely, 2^200143421 is an apocalyptic number.

It is an amenable number.

200143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200143421 is an equidigital number, since it uses as much as digits as its factorization.

200143421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 200143421 is about 14147.2054130842. The cubic root of 200143421 is about 584.9433027575.

Adding to 200143421 its reverse (124341002), we get a palindrome (324484423).

The spelling of 200143421 in words is "two hundred million, one hundred forty-three thousand, four hundred twenty-one".