255220447 has 2 divisors, whose sum is σ = 255220448. Its totient is φ = 255220446.

The previous prime is 255220423. The next prime is 255220457. The reversal of 255220447 is 744022552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255220447 - 2⁷ = 255220319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255220417) 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 as a sum of consecutive naturals, namely, 127610223 + 127610224.

It is an arithmetic number, because the mean of its divisors is an integer number (127610224).

Almost surely, 2^255220447 is an apocalyptic number.

255220447 is a deficient number, since it is larger than the sum of its proper divisors (1).

255220447 is an equidigital number, since it uses as much as digits as its factorization.

255220447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 255220447 is about 15975.6203948391. The cubic root of 255220447 is about 634.3152533602.

Adding to 255220447 its reverse (744022552), we get a palindrome (999242999).

The spelling of 255220447 in words is "two hundred fifty-five million, two hundred twenty thousand, four hundred forty-seven".