255205393 has 2 divisors, whose sum is σ = 255205394. Its totient is φ = 255205392.

The previous prime is 255205339. The next prime is 255205409. The reversal of 255205393 is 393502552.

Together with previous prime (255205339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215854864 + 39350529 = 14692^2 + 6273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255205393 is a prime.

It is not a weakly prime, because it can be changed into another prime (255205333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127602696 + 127602697.

It is an arithmetic number, because the mean of its divisors is an integer number (127602697).

Almost surely, 2^255205393 is an apocalyptic number.

It is an amenable number.

255205393 is a deficient number, since it is larger than the sum of its proper divisors (1).

255205393 is an equidigital number, since it uses as much as digits as its factorization.

255205393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 255205393 is about 15975.1492324798. The cubic root of 255205393 is about 634.3027815675.

The spelling of 255205393 in words is "two hundred fifty-five million, two hundred five thousand, three hundred ninety-three".