255806057 has 8 divisors (see below), whose sum is σ = 275622984. Its totient is φ = 236009088.

The previous prime is 255805999. The next prime is 255806059. The reversal of 255806057 is 750608552.

It can be written as a sum of positive squares in 4 ways, for example, as 94109401 + 161696656 = 9701^2 + 12716^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255806057 - 2²⁴ = 239028841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255806057.

It is not an unprimeable number, because it can be changed into a prime (255806059) 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 7 ways as a sum of consecutive naturals, for example, 31643 + ... + 38895.

It is an arithmetic number, because the mean of its divisors is an integer number (34452873).

Almost surely, 2^255806057 is an apocalyptic number.

It is an amenable number.

255806057 is a deficient number, since it is larger than the sum of its proper divisors (19816927).

255806057 is a wasteful number, since it uses less digits than its factorization.

255806057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 255806057 is about 15993.9381329302. The cubic root of 255806057 is about 634.8000337559.

The spelling of 255806057 in words is "two hundred fifty-five million, eight hundred six thousand, fifty-seven".