255247999 has 2 divisors, whose sum is σ = 255248000. Its totient is φ = 255247998.

The previous prime is 255247943. The next prime is 255248009. The reversal of 255247999 is 999742552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255247999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255241999) 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, 127623999 + 127624000.

It is an arithmetic number, because the mean of its divisors is an integer number (127624000).

Almost surely, 2^255247999 is an apocalyptic number.

255247999 is a deficient number, since it is larger than the sum of its proper divisors (1).

255247999 is an equidigital number, since it uses as much as digits as its factorization.

255247999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The square root of 255247999 is about 15976.4826854975. The cubic root of 255247999 is about 634.3380781054.

The spelling of 255247999 in words is "two hundred fifty-five million, two hundred forty-seven thousand, nine hundred ninety-nine".