221201343 has 24 divisors (see below), whose sum is σ = 352984320. Its totient is φ = 132359760.

The previous prime is 221201339. The next prime is 221201359. The reversal of 221201343 is 343102122.

It is not a de Polignac number, because 221201343 - 2² = 221201339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6321 + ... + 21962.

It is an arithmetic number, because the mean of its divisors is an integer number (14707680).

Almost surely, 2^221201343 is an apocalyptic number.

221201343 is a deficient number, since it is larger than the sum of its proper divisors (131782977).

221201343 is a wasteful number, since it uses less digits than its factorization.

221201343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28379 (or 28376 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 221201343 is about 14872.8391035471. The cubic root of 221201343 is about 604.7779099678. Note that the first 3 decimals are identical.

Adding to 221201343 its reverse (343102122), we get a palindrome (564303465).

The spelling of 221201343 in words is "two hundred twenty-one million, two hundred one thousand, three hundred forty-three".