255265639 has 2 divisors, whose sum is σ = 255265640. Its totient is φ = 255265638.

The previous prime is 255265609. The next prime is 255265643. The reversal of 255265639 is 936562552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255265639 - 2⁵ = 255265607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255265595 and 255265604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255265609) 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 as a sum of consecutive naturals, namely, 127632819 + 127632820.

It is an arithmetic number, because the mean of its divisors is an integer number (127632820).

Almost surely, 2^255265639 is an apocalyptic number.

255265639 is a deficient number, since it is larger than the sum of its proper divisors (1).

255265639 is an equidigital number, since it uses as much as digits as its factorization.

255265639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 43.

The square root of 255265639 is about 15977.0347373973. The cubic root of 255265639 is about 634.3526906469.

The spelling of 255265639 in words is "two hundred fifty-five million, two hundred sixty-five thousand, six hundred thirty-nine".