205120571 has 2 divisors, whose sum is σ = 205120572. Its totient is φ = 205120570.

The previous prime is 205120541. The next prime is 205120627. The reversal of 205120571 is 175021502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205120571 - 2⁶ = 205120507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205120501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102560285 + 102560286.

It is an arithmetic number, because the mean of its divisors is an integer number (102560286).

Almost surely, 2^205120571 is an apocalyptic number.

205120571 is a deficient number, since it is larger than the sum of its proper divisors (1).

205120571 is an equidigital number, since it uses as much as digits as its factorization.

205120571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 205120571 is about 14322.0309663120. The cubic root of 205120571 is about 589.7524298862.

It can be divided in two parts, 2051 and 20571, that added together give a palindrome (22622).

The spelling of 205120571 in words is "two hundred five million, one hundred twenty thousand, five hundred seventy-one".