255105209 has 2 divisors, whose sum is σ = 255105210. Its totient is φ = 255105208.

The previous prime is 255105173. The next prime is 255105223. The reversal of 255105209 is 902501552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145274809 + 109830400 = 12053^2 + 10480^2 .

It is a cyclic number.

It is not a de Polignac number, because 255105209 - 2²⁰ = 254056633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255105709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127552604 + 127552605.

It is an arithmetic number, because the mean of its divisors is an integer number (127552605).

Almost surely, 2^255105209 is an apocalyptic number.

It is an amenable number.

255105209 is a deficient number, since it is larger than the sum of its proper divisors (1).

255105209 is an equidigital number, since it uses as much as digits as its factorization.

255105209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 255105209 is about 15972.0133045274. The cubic root of 255105209 is about 634.2197695978.

The spelling of 255105209 in words is "two hundred fifty-five million, one hundred five thousand, two hundred nine".