244204021 has 2 divisors, whose sum is σ = 244204022. Its totient is φ = 244204020.

The previous prime is 244204013. The next prime is 244204049. The reversal of 244204021 is 120402442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217887121 + 26316900 = 14761^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 244204021 - 2³ = 244204013 is a prime.

It is a super-3 number, since 3×244204021³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 244204021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244204001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122102010 + 122102011.

It is an arithmetic number, because the mean of its divisors is an integer number (122102011).

Almost surely, 2^244204021 is an apocalyptic number.

It is an amenable number.

244204021 is a deficient number, since it is larger than the sum of its proper divisors (1).

244204021 is an equidigital number, since it uses as much as digits as its factorization.

244204021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 244204021 is about 15627.0285403208. The cubic root of 244204021 is about 625.0540932381.

Adding to 244204021 its reverse (120402442), we get a palindrome (364606463).

It can be divided in two parts, 24420 and 4021, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 244204021 in words is "two hundred forty-four million, two hundred four thousand, twenty-one".