205290143 has 2 divisors, whose sum is σ = 205290144. Its totient is φ = 205290142.

The previous prime is 205290067. The next prime is 205290149. The reversal of 205290143 is 341092502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205290143 - 2²⁰ = 204241567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205290149) 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, 102645071 + 102645072.

It is an arithmetic number, because the mean of its divisors is an integer number (102645072).

Almost surely, 2^205290143 is an apocalyptic number.

205290143 is a deficient number, since it is larger than the sum of its proper divisors (1).

205290143 is an equidigital number, since it uses as much as digits as its factorization.

205290143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 205290143 is about 14327.9497137588. The cubic root of 205290143 is about 589.9149001075.

The spelling of 205290143 in words is "two hundred five million, two hundred ninety thousand, one hundred forty-three".