216570043 has 2 divisors, whose sum is σ = 216570044. Its totient is φ = 216570042.

The previous prime is 216570041. The next prime is 216570083. The reversal of 216570043 is 340075612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216570043 - 2¹ = 216570041 is a prime.

Together with 216570041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 216569993 and 216570020.

It is not a weakly prime, because it can be changed into another prime (216570041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108285021 + 108285022.

It is an arithmetic number, because the mean of its divisors is an integer number (108285022).

Almost surely, 2^216570043 is an apocalyptic number.

216570043 is a deficient number, since it is larger than the sum of its proper divisors (1).

216570043 is an equidigital number, since it uses as much as digits as its factorization.

216570043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 216570043 is about 14716.3189351142. The cubic root of 216570043 is about 600.5273539531.

The spelling of 216570043 in words is "two hundred sixteen million, five hundred seventy thousand, forty-three".