216703499 has 2 divisors, whose sum is σ = 216703500. Its totient is φ = 216703498.

The previous prime is 216703477. The next prime is 216703559. The reversal of 216703499 is 994307612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216703499 - 2⁸ = 216703243 is a prime.

It is not a weakly prime, because it can be changed into another prime (216703429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108351749 + 108351750.

It is an arithmetic number, because the mean of its divisors is an integer number (108351750).

Almost surely, 2^216703499 is an apocalyptic number.

216703499 is a deficient number, since it is larger than the sum of its proper divisors (1).

216703499 is an equidigital number, since it uses as much as digits as its factorization.

216703499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 216703499 is about 14720.8525228670. The cubic root of 216703499 is about 600.6506820626.

The spelling of 216703499 in words is "two hundred sixteen million, seven hundred three thousand, four hundred ninety-nine".