216946 has 8 divisors (see below), whose sum is σ = 330480. Its totient is φ = 106788.

The previous prime is 216919. The next prime is 216947. The reversal of 216946 is 649612.

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (216947) 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 3 ways as a sum of consecutive naturals, for example, 676 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2²¹⁶⁹⁴⁶ is an apocalyptic number.

216946 is a deficient number, since it is larger than the sum of its proper divisors (113534).

216946 is a wasteful number, since it uses less digits than its factorization.

216946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

The product of its digits is 2592, while the sum is 28.

The square root of 216946 is about 465.7746236110. The cubic root of 216946 is about 60.0874650285.

The spelling of 216946 in words is "two hundred sixteen thousand, nine hundred forty-six".