216312839 has 2 divisors, whose sum is σ = 216312840. Its totient is φ = 216312838.

The previous prime is 216312781. The next prime is 216312851. The reversal of 216312839 is 938213612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216312839 - 2²⁰ = 215264263 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 216312799 and 216312808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216312869) 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, 108156419 + 108156420.

It is an arithmetic number, because the mean of its divisors is an integer number (108156420).

Almost surely, 2^216312839 is an apocalyptic number.

216312839 is a deficient number, since it is larger than the sum of its proper divisors (1).

216312839 is an equidigital number, since it uses as much as digits as its factorization.

216312839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 216312839 is about 14707.5776047587. The cubic root of 216312839 is about 600.2895260094.

The spelling of 216312839 in words is "two hundred sixteen million, three hundred twelve thousand, eight hundred thirty-nine".