205120043 has 2 divisors, whose sum is σ = 205120044. Its totient is φ = 205120042.

The previous prime is 205120037. The next prime is 205120051. The reversal of 205120043 is 340021502.

205120043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205120043 - 2⁶ = 205119979 is a prime.

It is not a weakly prime, because it can be changed into another prime (205120033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102560021 + 102560022.

It is an arithmetic number, because the mean of its divisors is an integer number (102560022).

Almost surely, 2^205120043 is an apocalyptic number.

205120043 is a deficient number, since it is larger than the sum of its proper divisors (1).

205120043 is an equidigital number, since it uses as much as digits as its factorization.

205120043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 205120043 is about 14322.0125331603. The cubic root of 205120043 is about 589.7519238594.

Adding to 205120043 its reverse (340021502), we get a palindrome (545141545).

The spelling of 205120043 in words is "two hundred five million, one hundred twenty thousand, forty-three".