221344343 has 4 divisors (see below), whose sum is σ = 241466568. Its totient is φ = 201222120.

The previous prime is 221344313. The next prime is 221344367. The reversal of 221344343 is 343443122.

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

It is not a de Polignac number, because 221344343 - 2⁸ = 221344087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221344303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10061096 + ... + 10061117.

It is an arithmetic number, because the mean of its divisors is an integer number (60366642).

Almost surely, 2^221344343 is an apocalyptic number.

221344343 is a deficient number, since it is larger than the sum of its proper divisors (20122225).

221344343 is a wasteful number, since it uses less digits than its factorization.

221344343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122224.

The product of its digits is 6912, while the sum is 26.

The square root of 221344343 is about 14877.6457478998. The cubic root of 221344343 is about 604.9082054570.

Adding to 221344343 its reverse (343443122), we get a palindrome (564787465).

The spelling of 221344343 in words is "two hundred twenty-one million, three hundred forty-four thousand, three hundred forty-three".