216109043 has 2 divisors, whose sum is σ = 216109044. Its totient is φ = 216109042.

The previous prime is 216108953. The next prime is 216109057. The reversal of 216109043 is 340901612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216109043 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (216109063) 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, 108054521 + 108054522.

It is an arithmetic number, because the mean of its divisors is an integer number (108054522).

Almost surely, 2^216109043 is an apocalyptic number.

216109043 is a deficient number, since it is larger than the sum of its proper divisors (1).

216109043 is an equidigital number, since it uses as much as digits as its factorization.

216109043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 216109043 is about 14700.6477068189. The cubic root of 216109043 is about 600.1009487554.

The spelling of 216109043 in words is "two hundred sixteen million, one hundred nine thousand, forty-three".