216573 has 8 divisors (see below), whose sum is σ = 330048. Its totient is φ = 123744.

The previous prime is 216571. The next prime is 216577. The reversal of 216573 is 375612.

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

It is not a de Polignac number, because 216573 - 2¹ = 216571 is a prime.

216573 is a lucky number.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5136 + ... + 5177.

It is an arithmetic number, because the mean of its divisors is an integer number (41256).

2²¹⁶⁵⁷³ is an apocalyptic number.

It is an amenable number.

216573 is a deficient number, since it is larger than the sum of its proper divisors (113475).

216573 is a wasteful number, since it uses less digits than its factorization.

216573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323.

The product of its digits is 1260, while the sum is 24.

The square root of 216573 is about 465.3740431094. The cubic root of 216573 is about 60.0530087097.

The spelling of 216573 in words is "two hundred sixteen thousand, five hundred seventy-three".