205512343 has 2 divisors, whose sum is σ = 205512344. Its totient is φ = 205512342.

The previous prime is 205512331. The next prime is 205512347. The reversal of 205512343 is 343215502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205512343 - 2⁵ = 205512311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205512347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102756171 + 102756172.

It is an arithmetic number, because the mean of its divisors is an integer number (102756172).

Almost surely, 2^205512343 is an apocalyptic number.

205512343 is a deficient number, since it is larger than the sum of its proper divisors (1).

205512343 is an equidigital number, since it uses as much as digits as its factorization.

205512343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 205512343 is about 14335.7016919298. The cubic root of 205512343 is about 590.1276588649.

Adding to 205512343 its reverse (343215502), we get a palindrome (548727845).

The spelling of 205512343 in words is "two hundred five million, five hundred twelve thousand, three hundred forty-three".