255044221 has 2 divisors, whose sum is σ = 255044222. Its totient is φ = 255044220.

The previous prime is 255044213. The next prime is 255044249. The reversal of 255044221 is 122440552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136539225 + 118504996 = 11685^2 + 10886^2 .

It is a cyclic number.

It is not a de Polignac number, because 255044221 - 2³ = 255044213 is a prime.

It is equal to p_13940116 and since 255044221 and 13940116 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255044281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127522110 + 127522111.

It is an arithmetic number, because the mean of its divisors is an integer number (127522111).

Almost surely, 2^255044221 is an apocalyptic number.

It is an amenable number.

255044221 is a deficient number, since it is larger than the sum of its proper divisors (1).

255044221 is an equidigital number, since it uses as much as digits as its factorization.

255044221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 255044221 is about 15970.1039758669. The cubic root of 255044221 is about 634.1692245981.

Adding to 255044221 its reverse (122440552), we get a palindrome (377484773).

The spelling of 255044221 in words is "two hundred fifty-five million, forty-four thousand, two hundred twenty-one".