244005221 has 2 divisors, whose sum is σ = 244005222. Its totient is φ = 244005220.

The previous prime is 244005197. The next prime is 244005287. The reversal of 244005221 is 122500442.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227104900 + 16900321 = 15070^2 + 4111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244005221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 244005193 and 244005202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244004221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122002610 + 122002611.

It is an arithmetic number, because the mean of its divisors is an integer number (122002611).

Almost surely, 2^244005221 is an apocalyptic number.

It is an amenable number.

244005221 is a deficient number, since it is larger than the sum of its proper divisors (1).

244005221 is an equidigital number, since it uses as much as digits as its factorization.

244005221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 244005221 is about 15620.6664710569. Note that the first 3 decimals coincide. The cubic root of 244005221 is about 624.8844338858.

Adding to 244005221 its reverse (122500442), we get a palindrome (366505663).

The spelling of 244005221 in words is "two hundred forty-four million, five thousand, two hundred twenty-one".