216838337 has 2 divisors, whose sum is σ = 216838338. Its totient is φ = 216838336.

The previous prime is 216838333. The next prime is 216838357. The reversal of 216838337 is 733838612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173817856 + 43020481 = 13184^2 + 6559^2 .

It is a cyclic number.

It is not a de Polignac number, because 216838337 - 2² = 216838333 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 216838294 and 216838303.

It is not a weakly prime, because it can be changed into another prime (216838333) 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, 108419168 + 108419169.

It is an arithmetic number, because the mean of its divisors is an integer number (108419169).

Almost surely, 2^216838337 is an apocalyptic number.

It is an amenable number.

216838337 is a deficient number, since it is larger than the sum of its proper divisors (1).

216838337 is an equidigital number, since it uses as much as digits as its factorization.

216838337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 216838337 is about 14725.4316405326. The cubic root of 216838337 is about 600.7752358804.

The spelling of 216838337 in words is "two hundred sixteen million, eight hundred thirty-eight thousand, three hundred thirty-seven".