216363 has 8 divisors (see below), whose sum is σ = 329728. Its totient is φ = 123624.

The previous prime is 216347. The next prime is 216371. The reversal of 216363 is 363612.

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

It is not a de Polignac number, because 216363 - 2⁴ = 216347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10303 = 216363 / (2 + 1 + 6 + 3 + 6 + 3).

It is an Ulam number.

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

216363 is a modest number, since divided by 6363 gives 21 as remainder.

It is not an unprimeable number, because it can be changed into a prime (216373) 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, 5131 + ... + 5172.

It is an arithmetic number, because the mean of its divisors is an integer number (41216).

2²¹⁶³⁶³ is an apocalyptic number.

216363 is a deficient number, since it is larger than the sum of its proper divisors (113365).

216363 is a wasteful number, since it uses less digits than its factorization.

216363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10313.

The product of its digits is 648, while the sum is 21.

The square root of 216363 is about 465.1483634283. The cubic root of 216363 is about 60.0335923002.

Adding to 216363 its reverse (363612), we get a palindrome (579975).

The spelling of 216363 in words is "two hundred sixteen thousand, three hundred sixty-three".