210223221 has 16 divisors (see below), whose sum is σ = 304686144. Its totient is φ = 128156544.

The previous prime is 210223213. The next prime is 210223253. The reversal of 210223221 is 122322012.

It is a happy number.

It is not a de Polignac number, because 210223221 - 2³ = 210223213 is a prime.

It is a super-2 number, since 2×210223221² = 88387605295229682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210224221) 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 15 ways as a sum of consecutive naturals, for example, 21016 + ... + 29361.

It is an arithmetic number, because the mean of its divisors is an integer number (19042884).

Almost surely, 2^210223221 is an apocalyptic number.

It is an amenable number.

210223221 is a deficient number, since it is larger than the sum of its proper divisors (94462923).

210223221 is a wasteful number, since it uses less digits than its factorization.

210223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50500.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 210223221 is about 14499.0765568018. The cubic root of 210223221 is about 594.6027251757.

Adding to 210223221 its reverse (122322012), we get a palindrome (332545233).

The spelling of 210223221 in words is "two hundred ten million, two hundred twenty-three thousand, two hundred twenty-one".