216963 has 6 divisors (see below), whose sum is σ = 313404. Its totient is φ = 144636.

The previous prime is 216947. The next prime is 216967. The reversal of 216963 is 369612.

It is a happy number.

It is not a de Polignac number, because 216963 - 2⁴ = 216947 is a prime.

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (216967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12045 + ... + 12062.

It is an arithmetic number, because the mean of its divisors is an integer number (52234).

2²¹⁶⁹⁶³ is an apocalyptic number.

216963 is a deficient number, since it is larger than the sum of its proper divisors (96441).

216963 is a wasteful number, since it uses less digits than its factorization.

216963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24113 (or 24110 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 216963 is about 465.7928724229. The cubic root of 216963 is about 60.0890344823.

The spelling of 216963 in words is "two hundred sixteen thousand, nine hundred sixty-three".