216640159 has 2 divisors, whose sum is σ = 216640160. Its totient is φ = 216640158.

The previous prime is 216640141. The next prime is 216640169. The reversal of 216640159 is 951046612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216640159 - 2¹⁷ = 216509087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216640139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108320079 + 108320080.

It is an arithmetic number, because the mean of its divisors is an integer number (108320080).

Almost surely, 2^216640159 is an apocalyptic number.

216640159 is a deficient number, since it is larger than the sum of its proper divisors (1).

216640159 is an equidigital number, since it uses as much as digits as its factorization.

216640159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 216640159 is about 14718.7009956721. The cubic root of 216640159 is about 600.5921552096.

The spelling of 216640159 in words is "two hundred sixteen million, six hundred forty thousand, one hundred fifty-nine".