255308121 has 6 divisors (see below), whose sum is σ = 368778410. Its totient is φ = 170205408.

The previous prime is 255308117. The next prime is 255308129. The reversal of 255308121 is 121803552.

It is a happy number.

255308121 is a `hidden beast` number, since 2 + 5 + 530 + 8 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 235192896 + 20115225 = 15336^2 + 4485^2 .

It is not a de Polignac number, because 255308121 - 2² = 255308117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255308129) 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 5 ways as a sum of consecutive naturals, for example, 14183776 + ... + 14183793.

Almost surely, 2^255308121 is an apocalyptic number.

It is an amenable number.

255308121 is a deficient number, since it is larger than the sum of its proper divisors (113470289).

255308121 is a wasteful number, since it uses less digits than its factorization.

255308121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28367575 (or 28367572 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 255308121 is about 15978.3641528161. The cubic root of 255308121 is about 634.3878789267.

The spelling of 255308121 in words is "two hundred fifty-five million, three hundred eight thousand, one hundred twenty-one".