210221244 has 72 divisors (see below), whose sum is σ = 580128640. Its totient is φ = 66379824.

The previous prime is 210221233. The next prime is 210221251. The reversal of 210221244 is 442122012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12777 + ... + 24159.

Almost surely, 2^210221244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210221244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290064320).

210221244 is an abundant number, since it is smaller than the sum of its proper divisors (369907396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210221244 is a wasteful number, since it uses less digits than its factorization.

210221244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11421 (or 11407 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 210221244 is about 14499.0083798858. The cubic root of 210221244 is about 594.6008612312.

Adding to 210221244 its reverse (442122012), we get a palindrome (652343256).

The spelling of 210221244 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred forty-four".