255581556 has 48 divisors (see below), whose sum is σ = 603504384. Its totient is φ = 84180096.

The previous prime is 255581549. The next prime is 255581647. The reversal of 255581556 is 655185552.

It is a happy number.

It is a super-2 number, since 2×255581556² = 130643863534762272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551781 + ... + 552243.

It is an arithmetic number, because the mean of its divisors is an integer number (12573008).

Almost surely, 2^255581556 is an apocalyptic number.

It is an amenable number.

255581556 is an abundant number, since it is smaller than the sum of its proper divisors (347922828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255581556 is a wasteful number, since it uses less digits than its factorization.

255581556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 918 counting only the distinct ones).

The product of its digits is 300000, while the sum is 42.

The square root of 255581556 is about 15986.9182771415. The cubic root of 255581556 is about 634.6142745975.

The spelling of 255581556 in words is "two hundred fifty-five million, five hundred eighty-one thousand, five hundred fifty-six".