216454 has 8 divisors (see below), whose sum is σ = 371088. Its totient is φ = 92760.

The previous prime is 216451. The next prime is 216481. The reversal of 216454 is 454612.

216454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216451) 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, 7717 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (46386).

2²¹⁶⁴⁵⁴ is an apocalyptic number.

216454 is a deficient number, since it is larger than the sum of its proper divisors (154634).

216454 is a wasteful number, since it uses less digits than its factorization.

216454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15470.

The product of its digits is 960, while the sum is 22.

The square root of 216454 is about 465.2461713975. The cubic root of 216454 is about 60.0420076195.

The spelling of 216454 in words is "two hundred sixteen thousand, four hundred fifty-four".