255208669 has 4 divisors (see below), whose sum is σ = 257071644. Its totient is φ = 253345696.

The previous prime is 255208651. The next prime is 255208673. The reversal of 255208669 is 966802552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198387225 + 56821444 = 14085^2 + 7538^2 .

It is a cyclic number.

It is not a de Polignac number, because 255208669 - 2¹¹ = 255206621 is a prime.

It is a super-2 number, since 2×255208669² = 130262929465503122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255208469) 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 in 3 ways as a sum of consecutive naturals, for example, 931282 + ... + 931555.

It is an arithmetic number, because the mean of its divisors is an integer number (64267911).

Almost surely, 2^255208669 is an apocalyptic number.

It is an amenable number.

255208669 is a deficient number, since it is larger than the sum of its proper divisors (1862975).

255208669 is a wasteful number, since it uses less digits than its factorization.

255208669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862974.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 255208669 is about 15975.2517664042. The cubic root of 255208669 is about 634.3054956781.

The spelling of 255208669 in words is "two hundred fifty-five million, two hundred eight thousand, six hundred sixty-nine".