255024221 has 2 divisors, whose sum is σ = 255024222. Its totient is φ = 255024220.

The previous prime is 255024193. The next prime is 255024241. The reversal of 255024221 is 122420552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172922500 + 82101721 = 13150^2 + 9061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255024221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255024241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127512110 + 127512111.

It is an arithmetic number, because the mean of its divisors is an integer number (127512111).

Almost surely, 2^255024221 is an apocalyptic number.

It is an amenable number.

255024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

255024221 is an equidigital number, since it uses as much as digits as its factorization.

255024221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 255024221 is about 15969.4777935911. The cubic root of 255024221 is about 634.1526474519.

Adding to 255024221 its reverse (122420552), we get a palindrome (377444773).

The spelling of 255024221 in words is "two hundred fifty-five million, twenty-four thousand, two hundred twenty-one".