205355419 has 2 divisors, whose sum is σ = 205355420. Its totient is φ = 205355418.

The previous prime is 205355411. The next prime is 205355441. The reversal of 205355419 is 914553502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205355419 - 2³ = 205355411 is a prime.

It is a super-2 number, since 2×205355419² = 84341696225331122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205355411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102677709 + 102677710.

It is an arithmetic number, because the mean of its divisors is an integer number (102677710).

Almost surely, 2^205355419 is an apocalyptic number.

205355419 is a deficient number, since it is larger than the sum of its proper divisors (1).

205355419 is an equidigital number, since it uses as much as digits as its factorization.

205355419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 205355419 is about 14330.2274580692. The cubic root of 205355419 is about 589.9774184597.

The spelling of 205355419 in words is "two hundred five million, three hundred fifty-five thousand, four hundred nineteen".