215197 has 2 divisors, whose sum is σ = 215198. Its totient is φ = 215196.

The previous prime is 215191. The next prime is 215239. The reversal of 215197 is 791512.

215197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119716 + 95481 = 346^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 215197 - 2¹¹ = 213149 is a prime.

215197 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107598 + 107599.

It is an arithmetic number, because the mean of its divisors is an integer number (107599).

2²¹⁵¹⁹⁷ is an apocalyptic number.

It is an amenable number.

215197 is a deficient number, since it is larger than the sum of its proper divisors (1).

215197 is an equidigital number, since it uses as much as digits as its factorization.

215197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 25.

The square root of 215197 is about 463.8933066989. The cubic root of 215197 is about 59.9255558208.

The spelling of 215197 in words is "two hundred fifteen thousand, one hundred ninety-seven".