216582011 has 2 divisors, whose sum is σ = 216582012. Its totient is φ = 216582010.

The previous prime is 216581957. The next prime is 216582031. The reversal of 216582011 is 110285612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216582011 is a prime.

It is not a weakly prime, because it can be changed into another prime (216582031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108291005 + 108291006.

It is an arithmetic number, because the mean of its divisors is an integer number (108291006).

Almost surely, 2^216582011 is an apocalyptic number.

216582011 is a deficient number, since it is larger than the sum of its proper divisors (1).

216582011 is an equidigital number, since it uses as much as digits as its factorization.

216582011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 216582011 is about 14716.7255529211. The cubic root of 216582011 is about 600.5384157770.

The spelling of 216582011 in words is "two hundred sixteen million, five hundred eighty-two thousand, eleven".