217043030 has 8 divisors (see below), whose sum is σ = 390677472. Its totient is φ = 86817208.

The previous prime is 217043011. The next prime is 217043033. The reversal of 217043030 is 30340712.

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 = 217042993 and 217043011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217043033) 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, 10852142 + ... + 10852161.

It is an arithmetic number, because the mean of its divisors is an integer number (48834684).

Almost surely, 2^217043030 is an apocalyptic number.

217043030 is a deficient number, since it is larger than the sum of its proper divisors (173634442).

217043030 is a wasteful number, since it uses less digits than its factorization.

217043030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21704310.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 217043030 is about 14732.3803236273. The cubic root of 217043030 is about 600.9642181607.

Adding to 217043030 its reverse (30340712), we get a palindrome (247383742).

The spelling of 217043030 in words is "two hundred seventeen million, forty-three thousand, thirty".