211163197 has 6 divisors (see below), whose sum is σ = 245638878. Its totient is φ = 180996984.

The previous prime is 211163191. The next prime is 211163201. The reversal of 211163197 is 791361112.

It can be written as a sum of positive squares in only one way, i.e., 181198521 + 29964676 = 13461^2 + 5474^2 .

It is a de Polignac number, because none of the positive numbers 2^k-211163197 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 (211163191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2154678 + ... + 2154775.

It is an arithmetic number, because the mean of its divisors is an integer number (40939813).

Almost surely, 2^211163197 is an apocalyptic number.

It is an amenable number.

211163197 is a deficient number, since it is larger than the sum of its proper divisors (34475681).

211163197 is an equidigital number, since it uses as much as digits as its factorization.

211163197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309467 (or 4309460 counting only the distinct ones).

The product of its digits is 2268, while the sum is 31.

The square root of 211163197 is about 14531.4554329565. The cubic root of 211163197 is about 595.4876279405.

The spelling of 211163197 in words is "two hundred eleven million, one hundred sixty-three thousand, one hundred ninety-seven".