244425221 has 2 divisors, whose sum is σ = 244425222. Its totient is φ = 244425220.

The previous prime is 244425199. The next prime is 244425229. The reversal of 244425221 is 122524442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222904900 + 21520321 = 14930^2 + 4639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244425221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244425229) 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 as a sum of consecutive naturals, namely, 122212610 + 122212611.

It is an arithmetic number, because the mean of its divisors is an integer number (122212611).

Almost surely, 2^244425221 is an apocalyptic number.

It is an amenable number.

244425221 is a deficient number, since it is larger than the sum of its proper divisors (1).

244425221 is an equidigital number, since it uses as much as digits as its factorization.

244425221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 26.

The square root of 244425221 is about 15634.1044195055. The cubic root of 244425221 is about 625.2427609485.

Adding to 244425221 its reverse (122524442), we get a palindrome (366949663).

The spelling of 244425221 in words is "two hundred forty-four million, four hundred twenty-five thousand, two hundred twenty-one".