255260209 has 4 divisors (see below), whose sum is σ = 256182004. Its totient is φ = 254338416.

The previous prime is 255260183. The next prime is 255260227. The reversal of 255260209 is 902062552.

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 119421184 + 135839025 = 10928^2 + 11655^2 .

It is a cyclic number.

It is not a de Polignac number, because 255260209 - 2²³ = 246871601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255260309) 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, 460482 + ... + 461035.

It is an arithmetic number, because the mean of its divisors is an integer number (64045501).

Almost surely, 2^255260209 is an apocalyptic number.

It is an amenable number.

255260209 is a deficient number, since it is larger than the sum of its proper divisors (921795).

255260209 is an equidigital number, since it uses as much as digits as its factorization.

255260209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921794.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 255260209 is about 15976.8648050861. The cubic root of 255260209 is about 634.3481926404.

The spelling of 255260209 in words is "two hundred fifty-five million, two hundred sixty thousand, two hundred nine".