211117207 has 8 divisors (see below), whose sum is σ = 251767296. Its totient is φ = 173089752.

The previous prime is 211117199. The next prime is 211117213. The reversal of 211117207 is 702711112.

211117207 is digitally balanced in base 2, 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 cyclic number.

It is not a de Polignac number, because 211117207 - 2³ = 211117199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211117007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655483 + ... + 655804.

It is an arithmetic number, because the mean of its divisors is an integer number (31470912).

Almost surely, 2^211117207 is an apocalyptic number.

211117207 is a deficient number, since it is larger than the sum of its proper divisors (40650089).

211117207 is a wasteful number, since it uses less digits than its factorization.

211117207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311317.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 211117207 is about 14529.8729175447. The cubic root of 211117207 is about 595.4443936635. Note that the first 3 decimals are identical.

Adding to 211117207 its reverse (702711112), we get a palindrome (913828319).

The spelling of 211117207 in words is "two hundred eleven million, one hundred seventeen thousand, two hundred seven".