255806047 has 4 divisors (see below), whose sum is σ = 292349776. Its totient is φ = 219262320.

The previous prime is 255805999. The next prime is 255806059. The reversal of 255806047 is 740608552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255806047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255805997 and 255806015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255806087) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18271854 + ... + 18271867.

It is an arithmetic number, because the mean of its divisors is an integer number (73087444).

Almost surely, 2^255806047 is an apocalyptic number.

255806047 is a deficient number, since it is larger than the sum of its proper divisors (36543729).

255806047 is an equidigital number, since it uses as much as digits as its factorization.

255806047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36543728.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 255806047 is about 15993.9378203118. The cubic root of 255806047 is about 634.8000254840.

The spelling of 255806047 in words is "two hundred fifty-five million, eight hundred six thousand, forty-seven".