217323430 has 8 divisors (see below), whose sum is σ = 391182192. Its totient is φ = 86929368.

The previous prime is 217323413. The next prime is 217323439. The reversal of 217323430 is 34323712.

217323430 is digitally balanced in base 3, 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 a junction number, because it is equal to n+sod(n) for n = 217323395 and 217323404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217323439) 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, 10866162 + ... + 10866181.

It is an arithmetic number, because the mean of its divisors is an integer number (48897774).

Almost surely, 2^217323430 is an apocalyptic number.

217323430 is a deficient number, since it is larger than the sum of its proper divisors (173858762).

217323430 is a wasteful number, since it uses less digits than its factorization.

217323430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21732350.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 217323430 is about 14741.8937046772. The cubic root of 217323430 is about 601.2229039646. Note that the first 3 decimals are identical.

The spelling of 217323430 in words is "two hundred seventeen million, three hundred twenty-three thousand, four hundred thirty".