221321343 has 8 divisors (see below), whose sum is σ = 295284528. Its totient is φ = 147452864.

The previous prime is 221321333. The next prime is 221321363. The reversal of 221321343 is 343123122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221321343 - 2⁶ = 221321279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18030 + ... + 27707.

It is an arithmetic number, because the mean of its divisors is an integer number (36910566).

Almost surely, 2^221321343 is an apocalyptic number.

221321343 is a deficient number, since it is larger than the sum of its proper divisors (73963185).

221321343 is a wasteful number, since it uses less digits than its factorization.

221321343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47353.

The product of its digits is 864, while the sum is 21.

The square root of 221321343 is about 14876.8727560600. The cubic root of 221321343 is about 604.8872526277.

Adding to 221321343 its reverse (343123122), we get a palindrome (564444465).

The spelling of 221321343 in words is "two hundred twenty-one million, three hundred twenty-one thousand, three hundred forty-three".