255531663 has 6 divisors (see below), whose sum is σ = 369101304. Its totient is φ = 170354436.

The previous prime is 255531649. The next prime is 255531691. The reversal of 255531663 is 366135552.

It is not a de Polignac number, because 255531663 - 2⁵ = 255531631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255531163) 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, 14196195 + ... + 14196212.

It is an arithmetic number, because the mean of its divisors is an integer number (61516884).

Almost surely, 2^255531663 is an apocalyptic number.

255531663 is a deficient number, since it is larger than the sum of its proper divisors (113569641).

255531663 is a wasteful number, since it uses less digits than its factorization.

255531663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28392413 (or 28392410 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 255531663 is about 15985.3577689084. The cubic root of 255531663 is about 634.5729767941.

The spelling of 255531663 in words is "two hundred fifty-five million, five hundred thirty-one thousand, six hundred sixty-three".