255808469 has 12 divisors (see below), whose sum is σ = 315078444. Its totient is φ = 206365824.

The previous prime is 255808459. The next prime is 255808481. The reversal of 255808469 is 964808552.

It can be written as a sum of positive squares in 2 ways, for example, as 87198244 + 168610225 = 9338^2 + 12985^2 .

It is not a de Polignac number, because 255808469 - 2⁴ = 255808453 is a prime.

It is a super-2 number, since 2×255808469² = 130875945624247922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255808459) 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 in 11 ways as a sum of consecutive naturals, for example, 152714 + ... + 154379.

It is an arithmetic number, because the mean of its divisors is an integer number (26256537).

Almost surely, 2^255808469 is an apocalyptic number.

It is an amenable number.

255808469 is a deficient number, since it is larger than the sum of its proper divisors (59269975).

255808469 is a wasteful number, since it uses less digits than its factorization.

255808469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307124 (or 307117 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 255808469 is about 15994.0135363204. The cubic root of 255808469 is about 634.8020289301.

The spelling of 255808469 in words is "two hundred fifty-five million, eight hundred eight thousand, four hundred sixty-nine".