216659041 has 2 divisors, whose sum is σ = 216659042. Its totient is φ = 216659040.

The previous prime is 216658979. The next prime is 216659059. The reversal of 216659041 is 140956612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114062400 + 102596641 = 10680^2 + 10129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216659041 is a prime.

It is a super-2 number, since 2×216659041² = 93882280094079362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216658988 and 216659006.

It is not a weakly prime, because it can be changed into another prime (216659141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108329520 + 108329521.

It is an arithmetic number, because the mean of its divisors is an integer number (108329521).

Almost surely, 2^216659041 is an apocalyptic number.

It is an amenable number.

216659041 is a deficient number, since it is larger than the sum of its proper divisors (1).

216659041 is an equidigital number, since it uses as much as digits as its factorization.

216659041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 216659041 is about 14719.3424105834. The cubic root of 216659041 is about 600.6096035775.

The spelling of 216659041 in words is "two hundred sixteen million, six hundred fifty-nine thousand, forty-one".