255511211 has 2 divisors, whose sum is σ = 255511212. Its totient is φ = 255511210.

The previous prime is 255511153. The next prime is 255511219. The reversal of 255511211 is 112115552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255511211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255511219) 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, 127755605 + 127755606.

It is an arithmetic number, because the mean of its divisors is an integer number (127755606).

Almost surely, 2^255511211 is an apocalyptic number.

255511211 is a deficient number, since it is larger than the sum of its proper divisors (1).

255511211 is an equidigital number, since it uses as much as digits as its factorization.

255511211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500, while the sum is 23.

The square root of 255511211 is about 15984.7180456835. The cubic root of 255511211 is about 634.5560465598.

Adding to 255511211 its reverse (112115552), we get a palindrome (367626763).

It can be divided in two parts, 25551 and 1211, that added together give a palindrome (26762).

The spelling of 255511211 in words is "two hundred fifty-five million, five hundred eleven thousand, two hundred eleven".