216021367 has 2 divisors, whose sum is σ = 216021368. Its totient is φ = 216021366.

The previous prime is 216021349. The next prime is 216021371. The reversal of 216021367 is 763120612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216021367 - 2¹¹ = 216019319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216621367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108010683 + 108010684.

It is an arithmetic number, because the mean of its divisors is an integer number (108010684).

Almost surely, 2^216021367 is an apocalyptic number.

216021367 is a deficient number, since it is larger than the sum of its proper divisors (1).

216021367 is an equidigital number, since it uses as much as digits as its factorization.

216021367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 216021367 is about 14697.6653588248. The cubic root of 216021367 is about 600.0197836069.

Adding to 216021367 its reverse (763120612), we get a palindrome (979141979).

The spelling of 216021367 in words is "two hundred sixteen million, twenty-one thousand, three hundred sixty-seven".