255552681 has 4 divisors (see below), whose sum is σ = 340736912. Its totient is φ = 170368452.

The previous prime is 255552637. The next prime is 255552733. The reversal of 255552681 is 186255552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255552681 - 2⁶ = 255552617 is a prime.

It is a super-2 number, since 2×255552681² = 130614345532575522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255552181) 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 3 ways as a sum of consecutive naturals, for example, 42592111 + ... + 42592116.

It is an arithmetic number, because the mean of its divisors is an integer number (85184228).

Almost surely, 2^255552681 is an apocalyptic number.

It is an amenable number.

255552681 is a deficient number, since it is larger than the sum of its proper divisors (85184231).

255552681 is an equidigital number, since it uses as much as digits as its factorization.

255552681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85184230.

The product of its digits is 120000, while the sum is 39.

The square root of 255552681 is about 15986.0151695161. The cubic root of 255552681 is about 634.5903746239.

The spelling of 255552681 in words is "two hundred fifty-five million, five hundred fifty-two thousand, six hundred eighty-one".