216020239 has 2 divisors, whose sum is σ = 216020240. Its totient is φ = 216020238.

The previous prime is 216020219. The next prime is 216020251. The reversal of 216020239 is 932020612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216020239 is a prime.

It is a super-3 number, since 3×216020239³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216020219) 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, 108010119 + 108010120.

It is an arithmetic number, because the mean of its divisors is an integer number (108010120).

Almost surely, 2^216020239 is an apocalyptic number.

216020239 is a deficient number, since it is larger than the sum of its proper divisors (1).

216020239 is an equidigital number, since it uses as much as digits as its factorization.

216020239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 216020239 is about 14697.6269853334. The cubic root of 216020239 is about 600.0187392295.

The spelling of 216020239 in words is "two hundred sixteen million, twenty thousand, two hundred thirty-nine".