217104030 has 128 divisors (see below), whose sum is σ = 680279040. Its totient is φ = 48574080.

The previous prime is 217104023. The next prime is 217104031. The reversal of 217104030 is 30401712.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 217103994 and 217104012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217104031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35799 + ... + 41421.

It is an arithmetic number, because the mean of its divisors is an integer number (5314680).

Almost surely, 2^217104030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217104030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340139520).

217104030 is an abundant number, since it is smaller than the sum of its proper divisors (463175010).

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

217104030 is a wasteful number, since it uses less digits than its factorization.

217104030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 217104030 is about 14734.4504478450. The cubic root of 217104030 is about 601.0205132704.

Adding to 217104030 its reverse (30401712), we get a palindrome (247505742).

The spelling of 217104030 in words is "two hundred seventeen million, one hundred four thousand, thirty".