200221009 has 2 divisors, whose sum is σ = 200221010. Its totient is φ = 200221008.

The previous prime is 200220989. The next prime is 200221013. The reversal of 200221009 is 900122002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113358609 + 86862400 = 10647^2 + 9320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200221009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200220983 and 200221001.

It is not a weakly prime, because it can be changed into another prime (200221039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110504 + 100110505.

It is an arithmetic number, because the mean of its divisors is an integer number (100110505).

Almost surely, 2^200221009 is an apocalyptic number.

It is an amenable number.

200221009 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221009 is an equidigital number, since it uses as much as digits as its factorization.

200221009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 200221009 is about 14149.9473143895. The cubic root of 200221009 is about 585.0188797569.

The spelling of 200221009 in words is "two hundred million, two hundred twenty-one thousand, nine".