255439565 has 16 divisors (see below), whose sum is σ = 314231808. Its totient is φ = 199233216.

The previous prime is 255439537. The next prime is 255439589. The reversal of 255439565 is 565934552.

It is a cyclic number.

It is not a de Polignac number, because 255439565 - 2¹⁰ = 255438541 is a prime.

It is a Duffinian number.

It is a congruent 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, 233159 + ... + 234251.

It is an arithmetic number, because the mean of its divisors is an integer number (19639488).

Almost surely, 2^255439565 is an apocalyptic number.

It is an amenable number.

255439565 is a deficient number, since it is larger than the sum of its proper divisors (58792243).

255439565 is a wasteful number, since it uses less digits than its factorization.

255439565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228.

The product of its digits is 810000, while the sum is 44.

The square root of 255439565 is about 15982.4768105572. The cubic root of 255439565 is about 634.4967306334.

The spelling of 255439565 in words is "two hundred fifty-five million, four hundred thirty-nine thousand, five hundred sixty-five".