205055399 has 2 divisors, whose sum is σ = 205055400. Its totient is φ = 205055398.

The previous prime is 205055339. The next prime is 205055453. The reversal of 205055399 is 993550502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205055399 - 2¹² = 205051303 is a prime.

It is a super-3 number, since 3×205055399³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205055339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102527699 + 102527700.

It is an arithmetic number, because the mean of its divisors is an integer number (102527700).

Almost surely, 2^205055399 is an apocalyptic number.

205055399 is a deficient number, since it is larger than the sum of its proper divisors (1).

205055399 is an equidigital number, since it uses as much as digits as its factorization.

205055399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60750, while the sum is 38.

The square root of 205055399 is about 14319.7555495895. The cubic root of 205055399 is about 589.6899635093.

The spelling of 205055399 in words is "two hundred five million, fifty-five thousand, three hundred ninety-nine".