217040030 has 16 divisors (see below), whose sum is σ = 391128480. Its totient is φ = 86714592.

The previous prime is 217040027. The next prime is 217040051. The reversal of 217040030 is 30040712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 217039990 and 217040008.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3365 + ... + 21104.

It is an arithmetic number, because the mean of its divisors is an integer number (24445530).

Almost surely, 2^217040030 is an apocalyptic number.

217040030 is a deficient number, since it is larger than the sum of its proper divisors (174088450).

217040030 is a wasteful number, since it uses less digits than its factorization.

217040030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25363.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 217040030 is about 14732.2785067348. The cubic root of 217040030 is about 600.9614492766.

Adding to 217040030 its reverse (30040712), we get a palindrome (247080742).

The spelling of 217040030 in words is "two hundred seventeen million, forty thousand, thirty".