255565443 has 16 divisors (see below), whose sum is σ = 406365696. Its totient is φ = 139687680.

The previous prime is 255565421. The next prime is 255565493. The reversal of 255565443 is 344565552.

It is not a de Polignac number, because 255565443 - 2⁶ = 255565379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255565493) 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 15 ways as a sum of consecutive naturals, for example, 264078 + ... + 265043.

It is an arithmetic number, because the mean of its divisors is an integer number (25397856).

Almost surely, 2^255565443 is an apocalyptic number.

255565443 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

255565443 is a deficient number, since it is larger than the sum of its proper divisors (150800253).

255565443 is a wasteful number, since it uses less digits than its factorization.

255565443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529154.

The product of its digits is 360000, while the sum is 39.

The square root of 255565443 is about 15986.4143259206. The cubic root of 255565443 is about 634.6009380134.

The spelling of 255565443 in words is "two hundred fifty-five million, five hundred sixty-five thousand, four hundred forty-three".