255505169 has 2 divisors, whose sum is σ = 255505170. Its totient is φ = 255505168.

The previous prime is 255505127. The next prime is 255505171. The reversal of 255505169 is 961505552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188018944 + 67486225 = 13712^2 + 8215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255505169 is a prime.

It is a super-2 number, since 2×255505169² = 130565782771437122, which contains 22 as substring.

Together with 255505171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255507169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127752584 + 127752585.

It is an arithmetic number, because the mean of its divisors is an integer number (127752585).

Almost surely, 2^255505169 is an apocalyptic number.

It is an amenable number.

255505169 is a deficient number, since it is larger than the sum of its proper divisors (1).

255505169 is an equidigital number, since it uses as much as digits as its factorization.

255505169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 38.

The square root of 255505169 is about 15984.5290515548. The cubic root of 255505169 is about 634.5510447990.

The spelling of 255505169 in words is "two hundred fifty-five million, five hundred five thousand, one hundred sixty-nine".