255705911 has 2 divisors, whose sum is σ = 255705912. Its totient is φ = 255705910.

The previous prime is 255705899. The next prime is 255705917. The reversal of 255705911 is 119507552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255705911 - 2¹⁰ = 255704887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255705917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127852955 + 127852956.

It is an arithmetic number, because the mean of its divisors is an integer number (127852956).

Almost surely, 2^255705911 is an apocalyptic number.

255705911 is a deficient number, since it is larger than the sum of its proper divisors (1).

255705911 is an equidigital number, since it uses as much as digits as its factorization.

255705911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 35.

The square root of 255705911 is about 15990.8070778182. The cubic root of 255705911 is about 634.7171832522.

The spelling of 255705911 in words is "two hundred fifty-five million, seven hundred five thousand, nine hundred eleven".