216166043 has 2 divisors, whose sum is σ = 216166044. Its totient is φ = 216166042.

The previous prime is 216166039. The next prime is 216166051. The reversal of 216166043 is 340661612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216166043 - 2² = 216166039 is a prime.

It is a Chen prime.

It is equal to p_11923049 and since 216166043 and 11923049 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 216165997 and 216166015.

It is not a weakly prime, because it can be changed into another prime (216166073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108083021 + 108083022.

It is an arithmetic number, because the mean of its divisors is an integer number (108083022).

Almost surely, 2^216166043 is an apocalyptic number.

216166043 is a deficient number, since it is larger than the sum of its proper divisors (1).

216166043 is an equidigital number, since it uses as much as digits as its factorization.

216166043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 216166043 is about 14702.5862690889. The cubic root of 216166043 is about 600.1537041402.

The spelling of 216166043 in words is "two hundred sixteen million, one hundred sixty-six thousand, forty-three".