221322441 has 8 divisors (see below), whose sum is σ = 298412640. Its totient is φ = 145890272.

The previous prime is 221322433. The next prime is 221322443. The reversal of 221322441 is 144223122.

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 221322441 - 2³ = 221322433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221322443) 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, 414195 + ... + 414728.

It is an arithmetic number, because the mean of its divisors is an integer number (37301580).

Almost surely, 2^221322441 is an apocalyptic number.

It is an amenable number.

221322441 is a deficient number, since it is larger than the sum of its proper divisors (77090199).

221322441 is an equidigital number, since it uses as much as digits as its factorization.

221322441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829015.

The product of its digits is 768, while the sum is 21.

The square root of 221322441 is about 14876.9096589312. The cubic root of 221322441 is about 604.8882529306. Note that the first 3 decimals are identical.

Adding to 221322441 its reverse (144223122), we get a palindrome (365545563).

The spelling of 221322441 in words is "two hundred twenty-one million, three hundred twenty-two thousand, four hundred forty-one".