255902881 has 8 divisors (see below), whose sum is σ = 277439400. Its totient is φ = 234630912.

The previous prime is 255902863. The next prime is 255902891. The reversal of 255902881 is 188209552.

It can be written as a sum of positive squares in 4 ways, for example, as 8910225 + 246992656 = 2985^2 + 15716^2 .

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 255902881 - 2⁹ = 255902369 is a prime.

It is a super-2 number, since 2×255902881² = 130972569008200322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255902821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64120 + ... + 67993.

It is an arithmetic number, because the mean of its divisors is an integer number (34679925).

Almost surely, 2^255902881 is an apocalyptic number.

It is an amenable number.

255902881 is a deficient number, since it is larger than the sum of its proper divisors (21536519).

255902881 is a wasteful number, since it uses less digits than its factorization.

255902881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132275.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 255902881 is about 15996.9647433505. The cubic root of 255902881 is about 634.8801154215.

The spelling of 255902881 in words is "two hundred fifty-five million, nine hundred two thousand, eight hundred eighty-one".