223021441 has 4 divisors (see below), whose sum is σ = 223089412. Its totient is φ = 222953472.

The previous prime is 223021417. The next prime is 223021457. The reversal of 223021441 is 144120322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19360000 + 203661441 = 4400^2 + 14271^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021441 - 2⁷ = 223021313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223021481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28800 + ... + 35713.

It is an arithmetic number, because the mean of its divisors is an integer number (55772353).

Almost surely, 2^223021441 is an apocalyptic number.

It is an amenable number.

223021441 is a deficient number, since it is larger than the sum of its proper divisors (67971).

223021441 is an equidigital number, since it uses as much as digits as its factorization.

223021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67970.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 223021441 is about 14933.9024035916. The cubic root of 223021441 is about 606.4321339470.

Adding to 223021441 its reverse (144120322), we get a palindrome (367141763).

The spelling of 223021441 in words is "two hundred twenty-three million, twenty-one thousand, four hundred forty-one".