255806442 has 12 divisors (see below), whose sum is σ = 554247330. Its totient is φ = 85268808.

The previous prime is 255806423. The next prime is 255806479. The reversal of 255806442 is 244608552.

It is a happy number.

255806442 is a `hidden beast` number, since 2 + 5 + 5 + 8 + 0 + 644 + 2 = 666.

255806442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 191020041 + 64786401 = 13821^2 + 8049^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 255806397 and 255806406.

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 5 ways as a sum of consecutive naturals, for example, 7105717 + ... + 7105752.

Almost surely, 2^255806442 is an apocalyptic number.

255806442 is an abundant number, since it is smaller than the sum of its proper divisors (298440888).

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

255806442 is a wasteful number, since it uses less digits than its factorization.

255806442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14211477 (or 14211474 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 255806442 is about 15993.9501687357. The cubic root of 255806442 is about 634.8003522236.

The spelling of 255806442 in words is "two hundred fifty-five million, eight hundred six thousand, four hundred forty-two".