255550523321 has 2 divisors, whose sum is σ = 255550523322. Its totient is φ = 255550523320.

The previous prime is 255550523183. The next prime is 255550523351. The reversal of 255550523321 is 123325055552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191437751296 + 64112772025 = 437536^2 + 253205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255550523321 is a prime.

It is not a weakly prime, because it can be changed into another prime (255550523351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127775261660 + 127775261661.

It is an arithmetic number, because the mean of its divisors is an integer number (127775261661).

Almost surely, 2^255550523321 is an apocalyptic number.

It is an amenable number.

255550523321 is a deficient number, since it is larger than the sum of its proper divisors (1).

255550523321 is an equidigital number, since it uses as much as digits as its factorization.

255550523321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225000, while the sum is 38.

Adding to 255550523321 its reverse (123325055552), we get a palindrome (378875578873).

The spelling of 255550523321 in words is "two hundred fifty-five billion, five hundred fifty million, five hundred twenty-three thousand, three hundred twenty-one".