221331323 has 8 divisors (see below), whose sum is σ = 243110400. Its totient is φ = 200565288.

The previous prime is 221331293. The next prime is 221331337. The reversal of 221331323 is 323133122.

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 221331323 - 2¹⁴ = 221314939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221331295 and 221331304.

It is not an unprimeable number, because it can be changed into a prime (221331623) 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, 252803 + ... + 253676.

It is an arithmetic number, because the mean of its divisors is an integer number (30388800).

Almost surely, 2^221331323 is an apocalyptic number.

221331323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221331323 is a deficient number, since it is larger than the sum of its proper divisors (21779077).

221331323 is a wasteful number, since it uses less digits than its factorization.

221331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506521.

The product of its digits is 648, while the sum is 20.

The square root of 221331323 is about 14877.2081722345. The cubic root of 221331323 is about 604.8963445119.

Adding to 221331323 its reverse (323133122), we get a palindrome (544464445).

The spelling of 221331323 in words is "two hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-three".