216170833 has 2 divisors, whose sum is σ = 216170834. Its totient is φ = 216170832.

The previous prime is 216170831. The next prime is 216170837. The reversal of 216170833 is 338071612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134954689 + 81216144 = 11617^2 + 9012^2 .

It is a cyclic number.

It is not a de Polignac number, because 216170833 - 2¹ = 216170831 is a prime.

Together with 216170831, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 216170795 and 216170804.

It is not a weakly prime, because it can be changed into another prime (216170831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108085416 + 108085417.

It is an arithmetic number, because the mean of its divisors is an integer number (108085417).

Almost surely, 2^216170833 is an apocalyptic number.

It is an amenable number.

216170833 is a deficient number, since it is larger than the sum of its proper divisors (1).

216170833 is an equidigital number, since it uses as much as digits as its factorization.

216170833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 216170833 is about 14702.7491646971. The cubic root of 216170833 is about 600.1581370212.

The spelling of 216170833 in words is "two hundred sixteen million, one hundred seventy thousand, eight hundred thirty-three".