216071 has 2 divisors, whose sum is σ = 216072. Its totient is φ = 216070.

The previous prime is 216061. The next prime is 216091. The reversal of 216071 is 170612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216071 - 2¹⁴ = 199687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216071.

It is not a weakly prime, because it can be changed into another prime (216061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108035 + 108036.

It is an arithmetic number, because the mean of its divisors is an integer number (108036).

216071 is a Friedman number, since it can be written as 71+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁷¹ is an apocalyptic number.

216071 is a deficient number, since it is larger than the sum of its proper divisors (1).

216071 is an equidigital number, since it uses as much as digits as its factorization.

216071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 216071 is about 464.8343791072. The cubic root of 216071 is about 60.0065733539.

Adding to 216071 its reverse (170612), we get a palindrome (386683).

The spelling of 216071 in words is "two hundred sixteen thousand, seventy-one".