205116427 has 2 divisors, whose sum is σ = 205116428. Its totient is φ = 205116426.

The previous prime is 205116421. The next prime is 205116463. The reversal of 205116427 is 724611502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205116427 - 2⁷ = 205116299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205116395 and 205116404.

It is not a weakly prime, because it can be changed into another prime (205116421) 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, 102558213 + 102558214.

It is an arithmetic number, because the mean of its divisors is an integer number (102558214).

Almost surely, 2^205116427 is an apocalyptic number.

205116427 is a deficient number, since it is larger than the sum of its proper divisors (1).

205116427 is an equidigital number, since it uses as much as digits as its factorization.

205116427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 205116427 is about 14321.8862933623. The cubic root of 205116427 is about 589.7484583188.

Adding to 205116427 its reverse (724611502), we get a palindrome (929727929).

The spelling of 205116427 in words is "two hundred five million, one hundred sixteen thousand, four hundred twenty-seven".