255840047 has 2 divisors, whose sum is σ = 255840048. Its totient is φ = 255840046.

The previous prime is 255840037. The next prime is 255840077. The reversal of 255840047 is 740048552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255840047 - 2⁸ = 255839791 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 255839989 and 255840016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255840037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127920023 + 127920024.

It is an arithmetic number, because the mean of its divisors is an integer number (127920024).

Almost surely, 2^255840047 is an apocalyptic number.

255840047 is a deficient number, since it is larger than the sum of its proper divisors (1).

255840047 is an equidigital number, since it uses as much as digits as its factorization.

255840047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 255840047 is about 15995.0006877149. Note that the first 3 decimals coincide. The cubic root of 255840047 is about 634.8281486721.

Adding to 255840047 its reverse (740048552), we get a palindrome (995888599).

The spelling of 255840047 in words is "two hundred fifty-five million, eight hundred forty thousand, forty-seven".