216411 has 16 divisors (see below), whose sum is σ = 322560. Its totient is φ = 128160.

The previous prime is 216401. The next prime is 216421. The reversal of 216411 is 114612.

It is an interprime number because it is at equal distance from previous prime (216401) and next prime (216421).

It is not a de Polignac number, because 216411 - 2⁵ = 216379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216401) 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 15 ways as a sum of consecutive naturals, for example, 1120 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2²¹⁶⁴¹¹ is an apocalyptic number.

216411 is a deficient number, since it is larger than the sum of its proper divisors (106149).

216411 is a wasteful number, since it uses less digits than its factorization.

216411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 48, while the sum is 15.

The square root of 216411 is about 465.1999570077. The cubic root of 216411 is about 60.0380314440.

The spelling of 216411 in words is "two hundred sixteen thousand, four hundred eleven".