225544003044421 has 2 divisors, whose sum is σ = 225544003044422. Its totient is φ = 225544003044420.

The previous prime is 225544003044301. The next prime is 225544003044457. The reversal of 225544003044421 is 124440300445522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225542907103396 + 1095941025 = 15018086^2 + 33105^2 .

It is a cyclic number.

It is not a de Polignac number, because 225544003044421 - 2¹¹ = 225544003042373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225544003944421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112772001522210 + 112772001522211.

It is an arithmetic number, because the mean of its divisors is an integer number (112772001522211).

Almost surely, 2^{225544003044421} is an apocalyptic number.

It is an amenable number.

225544003044421 is a deficient number, since it is larger than the sum of its proper divisors (1).

225544003044421 is an equidigital number, since it uses as much as digits as its factorization.

225544003044421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 225544003044421 its reverse (124440300445522), we get a palindrome (349984303489943).

The spelling of 225544003044421 in words is "two hundred twenty-five trillion, five hundred forty-four billion, three million, forty-four thousand, four hundred twenty-one".