211311197 has 8 divisors (see below), whose sum is σ = 220644000. Its totient is φ = 202114864.

The previous prime is 211311169. The next prime is 211311209. The reversal of 211311197 is 791113112.

211311197 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 211311197 - 2¹⁰ = 211310173 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 (211311497) 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, 30947 + ... + 37152.

It is an arithmetic number, because the mean of its divisors is an integer number (27580500).

Almost surely, 2^211311197 is an apocalyptic number.

It is an amenable number.

211311197 is a deficient number, since it is larger than the sum of its proper divisors (9332803).

211311197 is a wasteful number, since it uses less digits than its factorization.

211311197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68235.

The product of its digits is 378, while the sum is 26.

The square root of 211311197 is about 14536.5469421042. The cubic root of 211311197 is about 595.6267171824.

The spelling of 211311197 in words is "two hundred eleven million, three hundred eleven thousand, one hundred ninety-seven".