216041 has 6 divisors (see below), whose sum is σ = 251370. Its totient is φ = 185136.

The previous prime is 216037. The next prime is 216061. The reversal of 216041 is 140612.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 78400 = 371^2 + 280^2 .

It is not a de Polignac number, because 216041 - 2² = 216037 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216061) 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 in 5 ways as a sum of consecutive naturals, for example, 2156 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

216041 is a Friedman number, since it can be written as 60^(2+1)+41, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁴¹ is an apocalyptic number.

It is an amenable number.

216041 is a deficient number, since it is larger than the sum of its proper divisors (35329).

216041 is an equidigital number, since it uses as much as digits as its factorization.

216041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423 (or 4416 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 216041 is about 464.8021084290. The cubic root of 216041 is about 60.0037960561.

Adding to 216041 its reverse (140612), we get a palindrome (356653).

The spelling of 216041 in words is "two hundred sixteen thousand, forty-one".