255639047 has 4 divisors (see below), whose sum is σ = 270676656. Its totient is φ = 240601440.

The previous prime is 255639037. The next prime is 255639067. The reversal of 255639047 is 740936552.

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

It is a cyclic number.

It is not a de Polignac number, because 255639047 - 2²⁶ = 188530183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255638995 and 255639013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255639037) 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, 7518779 + ... + 7518812.

It is an arithmetic number, because the mean of its divisors is an integer number (67669164).

Almost surely, 2^255639047 is an apocalyptic number.

255639047 is a deficient number, since it is larger than the sum of its proper divisors (15037609).

255639047 is a wasteful number, since it uses less digits than its factorization.

255639047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15037608.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 255639047 is about 15988.7162398987. The cubic root of 255639047 is about 634.6618548096.

The spelling of 255639047 in words is "two hundred fifty-five million, six hundred thirty-nine thousand, forty-seven".