216143243 has 2 divisors, whose sum is σ = 216143244. Its totient is φ = 216143242.

The previous prime is 216143201. The next prime is 216143251. The reversal of 216143243 is 342341612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216143243 - 2¹⁶ = 216077707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (216143143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108071621 + 108071622.

It is an arithmetic number, because the mean of its divisors is an integer number (108071622).

Almost surely, 2^216143243 is an apocalyptic number.

216143243 is a deficient number, since it is larger than the sum of its proper divisors (1).

216143243 is an equidigital number, since it uses as much as digits as its factorization.

216143243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 216143243 is about 14701.8108748548. The cubic root of 216143243 is about 600.1326030993.

Adding to 216143243 its reverse (342341612), we get a palindrome (558484855).

The spelling of 216143243 in words is "two hundred sixteen million, one hundred forty-three thousand, two hundred forty-three".