216349 has 8 divisors (see below), whose sum is σ = 255488. Its totient is φ = 179280.

The previous prime is 216347. The next prime is 216371. The reversal of 216349 is 943612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216349 - 2¹ = 216347 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

216349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (31936).

2²¹⁶³⁴⁹ is an apocalyptic number.

It is an amenable number.

216349 is a deficient number, since it is larger than the sum of its proper divisors (39139).

216349 is an equidigital number, since it uses as much as digits as its factorization.

216349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035.

The product of its digits is 1296, while the sum is 25.

The square root of 216349 is about 465.1333142229. The cubic root of 216349 is about 60.0322974263.

It can be divided in two parts, 216 and 349, that added together give a palindrome (565).

The spelling of 216349 in words is "two hundred sixteen thousand, three hundred forty-nine".