255520211 has 2 divisors, whose sum is σ = 255520212. Its totient is φ = 255520210.

The previous prime is 255520201. The next prime is 255520219. The reversal of 255520211 is 112025552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255520211 is a prime.

It is not a weakly prime, because it can be changed into another prime (255520219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127760105 + 127760106.

It is an arithmetic number, because the mean of its divisors is an integer number (127760106).

Almost surely, 2^255520211 is an apocalyptic number.

255520211 is a deficient number, since it is larger than the sum of its proper divisors (1).

255520211 is an equidigital number, since it uses as much as digits as its factorization.

255520211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 255520211 is about 15984.9995620895. Note that the first 3 decimals coincide. The cubic root of 255520211 is about 634.5634969013.

Adding to 255520211 its reverse (112025552), we get a palindrome (367545763).

The spelling of 255520211 in words is "two hundred fifty-five million, five hundred twenty thousand, two hundred eleven".