9950221 has 2 divisors, whose sum is σ = 9950222. Its totient is φ = 9950220.

The previous prime is 9950209. The next prime is 9950233. The reversal of 9950221 is 1220599.

9950221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (9950209) and next prime (9950233).

It can be written as a sum of positive squares in only one way, i.e., 6817321 + 3132900 = 2611^2 + 1770^2 .

It is an emirp because it is prime and its reverse (1220599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9950221 - 2⁷ = 9950093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9950221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9950201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4975110 + 4975111.

It is an arithmetic number, because the mean of its divisors is an integer number (4975111).

Almost surely, 2^9950221 is an apocalyptic number.

It is an amenable number.

9950221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9950221 is an equidigital number, since it uses as much as digits as its factorization.

9950221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 9950221 is about 3154.3970897780. The cubic root of 9950221 is about 215.0853888337.

The spelling of 9950221 in words is "nine million, nine hundred fifty thousand, two hundred twenty-one".