2195806 has 4 divisors (see below), whose sum is σ = 3293712. Its totient is φ = 1097902.

The previous prime is 2195801. The next prime is 2195819. The reversal of 2195806 is 6085912.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548950 + ... + 548953.

It is an arithmetic number, because the mean of its divisors is an integer number (823428).

2^2195806 is an apocalyptic number.

2195806 is a deficient number, since it is larger than the sum of its proper divisors (1097906).

2195806 is a wasteful number, since it uses less digits than its factorization.

2195806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097905.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2195806 is about 1481.8252258617. The cubic root of 2195806 is about 129.9764454366.

The spelling of 2195806 in words is "two million, one hundred ninety-five thousand, eight hundred six".