210414221 has 4 divisors (see below), whose sum is σ = 211196700. Its totient is φ = 209631744.

The previous prime is 210414199. The next prime is 210414223. The reversal of 210414221 is 122414012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8916196 + 201498025 = 2986^2 + 14195^2 .

It is a cyclic number.

It is not a de Polignac number, because 210414221 - 2¹⁰ = 210413197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210414221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210414223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390836 + ... + 391373.

It is an arithmetic number, because the mean of its divisors is an integer number (52799175).

Almost surely, 2^210414221 is an apocalyptic number.

It is an amenable number.

210414221 is a deficient number, since it is larger than the sum of its proper divisors (782479).

210414221 is an equidigital number, since it uses as much as digits as its factorization.

210414221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782478.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 210414221 is about 14505.6616877687. The cubic root of 210414221 is about 594.7827476975.

Adding to 210414221 its reverse (122414012), we get a palindrome (332828233).

The spelling of 210414221 in words is "two hundred ten million, four hundred fourteen thousand, two hundred twenty-one".