221024441 has 4 divisors (see below), whose sum is σ = 241117584. Its totient is φ = 200931300.

The previous prime is 221024431. The next prime is 221024449. The reversal of 221024441 is 144420122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221024441 - 2¹⁰ = 221023417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221024449) 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 3 ways as a sum of consecutive naturals, for example, 10046555 + ... + 10046576.

It is an arithmetic number, because the mean of its divisors is an integer number (60279396).

Almost surely, 2^221024441 is an apocalyptic number.

It is an amenable number.

221024441 is a deficient number, since it is larger than the sum of its proper divisors (20093143).

221024441 is a wasteful number, since it uses less digits than its factorization.

221024441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20093142.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 221024441 is about 14866.8907643798. The cubic root of 221024441 is about 604.6166466993.

Adding to 221024441 its reverse (144420122), we get a palindrome (365444563).

The spelling of 221024441 in words is "two hundred twenty-one million, twenty-four thousand, four hundred forty-one".