2166197 has 4 divisors (see below), whose sum is σ = 2363136. Its totient is φ = 1969260.

The previous prime is 2166179. The next prime is 2166221. The reversal of 2166197 is 7916612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166197 - 2⁸ = 2165941 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 (2166127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98453 + ... + 98474.

It is an arithmetic number, because the mean of its divisors is an integer number (590784).

2^2166197 is an apocalyptic number.

It is an amenable number.

2166197 is a deficient number, since it is larger than the sum of its proper divisors (196939).

2166197 is a wasteful number, since it uses less digits than its factorization.

2166197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196938.

The product of its digits is 4536, while the sum is 32.

The square root of 2166197 is about 1471.8005979072. The cubic root of 2166197 is about 129.3895840328.

The spelling of 2166197 in words is "two million, one hundred sixty-six thousand, one hundred ninety-seven".