216046399 has 2 divisors, whose sum is σ = 216046400. Its totient is φ = 216046398.

The previous prime is 216046381. The next prime is 216046447. The reversal of 216046399 is 993640612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216046399 - 2¹¹ = 216044351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216046309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108023199 + 108023200.

It is an arithmetic number, because the mean of its divisors is an integer number (108023200).

Almost surely, 2^216046399 is an apocalyptic number.

216046399 is a deficient number, since it is larger than the sum of its proper divisors (1).

216046399 is an equidigital number, since it uses as much as digits as its factorization.

216046399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 216046399 is about 14698.5168979731. The cubic root of 216046399 is about 600.0429589612.

The spelling of 216046399 in words is "two hundred sixteen million, forty-six thousand, three hundred ninety-nine".