221340323 has 8 divisors (see below), whose sum is σ = 236778192. Its totient is φ = 206171136.

The previous prime is 221340319. The next prime is 221340331. The reversal of 221340323 is 323043122.

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 221340323 - 2² = 221340319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221340295 and 221340304.

It is not an unprimeable number, because it can be changed into a prime (221345323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65465 + ... + 68762.

It is an arithmetic number, because the mean of its divisors is an integer number (29597274).

Almost surely, 2^221340323 is an apocalyptic number.

221340323 is a deficient number, since it is larger than the sum of its proper divisors (15437869).

221340323 is a wasteful number, since it uses less digits than its factorization.

221340323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134341.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 221340323 is about 14877.5106452659. The cubic root of 221340323 is about 604.9045433715.

Adding to 221340323 its reverse (323043122), we get a palindrome (544383445).

The spelling of 221340323 in words is "two hundred twenty-one million, three hundred forty thousand, three hundred twenty-three".