255216779 has 2 divisors, whose sum is σ = 255216780. Its totient is φ = 255216778.

The previous prime is 255216749. The next prime is 255216803. The reversal of 255216779 is 977612552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255216779 - 2⁸ = 255216523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255216719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127608389 + 127608390.

It is an arithmetic number, because the mean of its divisors is an integer number (127608390).

Almost surely, 2^255216779 is an apocalyptic number.

255216779 is a deficient number, since it is larger than the sum of its proper divisors (1).

255216779 is an equidigital number, since it uses as much as digits as its factorization.

255216779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 255216779 is about 15975.5055945031. The cubic root of 255216779 is about 634.3122145762.

The spelling of 255216779 in words is "two hundred fifty-five million, two hundred sixteen thousand, seven hundred seventy-nine".