216430 has 16 divisors (see below), whose sum is σ = 406944.
Its totient is φ = 82720.
The previous prime is 216421. The next prime is 216431. The reversal of 216430 is 34612.
It can be divided in two parts, 216 and 430, that added together give a palindrome (646).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (216431) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241 + ... + 700.
It is an arithmetic number, because the mean of its divisors is an integer number (25434).
2216430 is an apocalyptic number.
216430 is a deficient number, since it is larger than the sum of its proper divisors (190514).
216430 is a wasteful number, since it uses less digits than its factorization.
216430 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 971.
The product of its (nonzero) digits is 144, while the sum is 16.
The square root of 216430 is about 465.2203778856.
The cubic root of 216430 is about 60.0397884237.
The spelling of 216430 in words is "two hundred sixteen thousand, four hundred thirty".