217328011 has 4 divisors (see below), whose sum is σ = 224338624. Its totient is φ = 210317400.

The previous prime is 217327997. The next prime is 217328039. The reversal of 217328011 is 110823712.

It is a happy number.

217328011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217328011 - 2⁷ = 217327883 is a prime.

It is a super-2 number, since 2×217328011² = 94462928730432242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217328071) 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, 3505260 + ... + 3505321.

It is an arithmetic number, because the mean of its divisors is an integer number (56084656).

Almost surely, 2^217328011 is an apocalyptic number.

217328011 is a deficient number, since it is larger than the sum of its proper divisors (7010613).

217328011 is an equidigital number, since it uses as much as digits as its factorization.

217328011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010612.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 217328011 is about 14742.0490773841. The cubic root of 217328011 is about 601.2271283638.

The spelling of 217328011 in words is "two hundred seventeen million, three hundred twenty-eight thousand, eleven".