255921199 has 2 divisors, whose sum is σ = 255921200. Its totient is φ = 255921198.

The previous prime is 255921187. The next prime is 255921229. The reversal of 255921199 is 991129552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255921199 - 2²¹ = 253824047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255921499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127960599 + 127960600.

It is an arithmetic number, because the mean of its divisors is an integer number (127960600).

Almost surely, 2^255921199 is an apocalyptic number.

255921199 is a deficient number, since it is larger than the sum of its proper divisors (1).

255921199 is an equidigital number, since it uses as much as digits as its factorization.

255921199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 43.

The square root of 255921199 is about 15997.5372792189. The cubic root of 255921199 is about 634.8952636897.

The spelling of 255921199 in words is "two hundred fifty-five million, nine hundred twenty-one thousand, one hundred ninety-nine".