221435214 has 192 divisors, whose sum is σ = 634314240. Its totient is φ = 50561280.

The previous prime is 221435167. The next prime is 221435231. The reversal of 221435214 is 412534122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 966852 + ... + 967080.

It is an arithmetic number, because the mean of its divisors is an integer number (3303720).

Almost surely, 2^221435214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221435214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317157120).

221435214 is an abundant number, since it is smaller than the sum of its proper divisors (412879026).

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

221435214 is a wasteful number, since it uses less digits than its factorization.

221435214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 288 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 221435214 is about 14880.6993787255. The cubic root of 221435214 is about 604.9909740702.

Adding to 221435214 its reverse (412534122), we get a palindrome (633969336).

The spelling of 221435214 in words is "two hundred twenty-one million, four hundred thirty-five thousand, two hundred fourteen".