216654 has 8 divisors (see below), whose sum is σ = 433320. Its totient is φ = 72216.

The previous prime is 216653. The next prime is 216661. The reversal of 216654 is 456612.

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

216654 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216654.

It is not an unprimeable number, because it can be changed into a prime (216653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18049 + ... + 18060.

It is an arithmetic number, because the mean of its divisors is an integer number (54165).

2²¹⁶⁶⁵⁴ is an apocalyptic number.

216654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216654 is a wasteful number, since it uses less digits than its factorization.

216654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36114.

The product of its digits is 1440, while the sum is 24.

The square root of 216654 is about 465.4610617442. The cubic root of 216654 is about 60.0604945419.

It can be divided in two parts, 2166 and 54, that multiplied together give a square (116964 = 342²).

The spelling of 216654 in words is "two hundred sixteen thousand, six hundred fifty-four".