255765385 has 4 divisors (see below), whose sum is σ = 306918468. Its totient is φ = 204612304.

The previous prime is 255765379. The next prime is 255765401. The reversal of 255765385 is 583567552.

It is a happy number.

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 181063936 + 74701449 = 13456^2 + 8643^2 .

It is a cyclic number.

It is not a de Polignac number, because 255765385 - 2¹¹ = 255763337 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 25576534 + ... + 25576543.

It is an arithmetic number, because the mean of its divisors is an integer number (76729617).

Almost surely, 2^255765385 is an apocalyptic number.

It is an amenable number.

255765385 is a deficient number, since it is larger than the sum of its proper divisors (51153083).

255765385 is an equidigital number, since it uses as much as digits as its factorization.

255765385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51153082.

The product of its digits is 1260000, while the sum is 46.

The square root of 255765385 is about 15992.6666006642. Note that the first 4 decimals coincide. The cubic root of 255765385 is about 634.7663885330.

The spelling of 255765385 in words is "two hundred fifty-five million, seven hundred sixty-five thousand, three hundred eighty-five".