216354 has 16 divisors (see below), whose sum is σ = 438048. Its totient is φ = 71232.

The previous prime is 216347. The next prime is 216371. The reversal of 216354 is 453612.

It is a happy number.

216354 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 216354.

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 216354.

It is an unprimeable number.

216354 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474 + ... + 810.

It is an arithmetic number, because the mean of its divisors is an integer number (27378).

2²¹⁶³⁵⁴ is an apocalyptic number.

216354 is an abundant number, since it is smaller than the sum of its proper divisors (221694).

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

216354 is a wasteful number, since it uses less digits than its factorization.

216354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 720, while the sum is 21.

The square root of 216354 is about 465.1386889950. The cubic root of 216354 is about 60.0327598877.

Adding to 216354 its reverse (453612), we get a palindrome (669966).

The spelling of 216354 in words is "two hundred sixteen thousand, three hundred fifty-four".