216171041 has 2 divisors, whose sum is σ = 216171042. Its totient is φ = 216171040.

The previous prime is 216171013. The next prime is 216171049. The reversal of 216171041 is 140171612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213598225 + 2572816 = 14615^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 216171041 - 2¹⁴ = 216154657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216170998 and 216171016.

It is not a weakly prime, because it can be changed into another prime (216171049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108085520 + 108085521.

It is an arithmetic number, because the mean of its divisors is an integer number (108085521).

Almost surely, 2^216171041 is an apocalyptic number.

It is an amenable number.

216171041 is a deficient number, since it is larger than the sum of its proper divisors (1).

216171041 is an equidigital number, since it uses as much as digits as its factorization.

216171041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 216171041 is about 14702.7562382024. The cubic root of 216171041 is about 600.1583295122.

The spelling of 216171041 in words is "two hundred sixteen million, one hundred seventy-one thousand, forty-one".