216366443 has 2 divisors, whose sum is σ = 216366444. Its totient is φ = 216366442.

The previous prime is 216366431. The next prime is 216366467. The reversal of 216366443 is 344663612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216366443 - 2¹⁰ = 216365419 is a prime.

It is a super-3 number, since 3×216366443³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216366043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108183221 + 108183222.

It is an arithmetic number, because the mean of its divisors is an integer number (108183222).

Almost surely, 2^216366443 is an apocalyptic number.

216366443 is a deficient number, since it is larger than the sum of its proper divisors (1).

216366443 is an equidigital number, since it uses as much as digits as its factorization.

216366443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

The square root of 216366443 is about 14709.3998178036. The cubic root of 216366443 is about 600.3391073816.

The spelling of 216366443 in words is "two hundred sixteen million, three hundred sixty-six thousand, four hundred forty-three".