205152091 has 2 divisors, whose sum is σ = 205152092. Its totient is φ = 205152090.

The previous prime is 205152067. The next prime is 205152127. The reversal of 205152091 is 190251502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205152091 - 2⁹ = 205151579 is a prime.

It is not a weakly prime, because it can be changed into another prime (205152041) 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, 102576045 + 102576046.

It is an arithmetic number, because the mean of its divisors is an integer number (102576046).

Almost surely, 2^205152091 is an apocalyptic number.

205152091 is a deficient number, since it is larger than the sum of its proper divisors (1).

205152091 is an equidigital number, since it uses as much as digits as its factorization.

205152091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 205152091 is about 14323.1313266339. The cubic root of 205152091 is about 589.7826365827.

The spelling of 205152091 in words is "two hundred five million, one hundred fifty-two thousand, ninety-one".