197211 has 8 divisors (see below), whose sum is σ = 300544. Its totient is φ = 112680.

The previous prime is 197207. The next prime is 197221. The reversal of 197211 is 112791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197211 - 2² = 197207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9391 = 197211 / (1 + 9 + 7 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197221) 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, 4675 + ... + 4716.

It is an arithmetic number, because the mean of its divisors is an integer number (37568).

2¹⁹⁷²¹¹ is an apocalyptic number.

197211 is a deficient number, since it is larger than the sum of its proper divisors (103333).

197211 is an equidigital number, since it uses as much as digits as its factorization.

197211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9401.

The product of its digits is 126, while the sum is 21.

The square root of 197211 is about 444.0844514279. The cubic root of 197211 is about 58.2072451154.

The spelling of 197211 in words is "one hundred ninety-seven thousand, two hundred eleven".