255121305 has 16 divisors (see below), whose sum is σ = 409653504. Its totient is φ = 135578240.

The previous prime is 255121271. The next prime is 255121319. The reversal of 255121305 is 503121552.

It is a happy number.

It is not a de Polignac number, because 255121305 - 2⁶ = 255121241 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26049 + ... + 34478.

It is an arithmetic number, because the mean of its divisors is an integer number (25603344).

Almost surely, 2^255121305 is an apocalyptic number.

It is an amenable number.

255121305 is a deficient number, since it is larger than the sum of its proper divisors (154532199).

255121305 is a wasteful number, since it uses less digits than its factorization.

255121305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60816.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 255121305 is about 15972.5171779529. The cubic root of 255121305 is about 634.2331081294.

Adding to 255121305 its reverse (503121552), we get a palindrome (758242857).

The spelling of 255121305 in words is "two hundred fifty-five million, one hundred twenty-one thousand, three hundred five".