244420221 has 8 divisors (see below), whose sum is σ = 330757984. Its totient is φ = 160514640.

The previous prime is 244420181. The next prime is 244420247. The reversal of 244420221 is 122024442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 244420221 - 2⁶ = 244420157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244420021) 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, 607810 + ... + 608211.

It is an arithmetic number, because the mean of its divisors is an integer number (41344748).

Almost surely, 2^244420221 is an apocalyptic number.

It is an amenable number.

244420221 is a deficient number, since it is larger than the sum of its proper divisors (86337763).

244420221 is a wasteful number, since it uses less digits than its factorization.

244420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216091.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 244420221 is about 15633.9445118626. The cubic root of 244420221 is about 625.2384975653.

Adding to 244420221 its reverse (122024442), we get a palindrome (366444663).

The spelling of 244420221 in words is "two hundred forty-four million, four hundred twenty thousand, two hundred twenty-one".