216432299 has 2 divisors, whose sum is σ = 216432300. Its totient is φ = 216432298.

The previous prime is 216432283. The next prime is 216432319. The reversal of 216432299 is 992234612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216432299 - 2⁴ = 216432283 is a prime.

It is not a weakly prime, because it can be changed into another prime (216432239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108216149 + 108216150.

It is an arithmetic number, because the mean of its divisors is an integer number (108216150).

Almost surely, 2^216432299 is an apocalyptic number.

216432299 is a deficient number, since it is larger than the sum of its proper divisors (1).

216432299 is an equidigital number, since it uses as much as digits as its factorization.

216432299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 216432299 is about 14711.6382160519. The cubic root of 216432299 is about 600.4000101124.

The spelling of 216432299 in words is "two hundred sixteen million, four hundred thirty-two thousand, two hundred ninety-nine".