2195823 has 16 divisors (see below), whose sum is σ = 3454976. Its totient is φ = 1213920.

The previous prime is 2195819. The next prime is 2195827. The reversal of 2195823 is 3285912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2195819) and next prime (2195827).

It is not a de Polignac number, because 2195823 - 2² = 2195819 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2195823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036 + ... + 2337.

It is an arithmetic number, because the mean of its divisors is an integer number (215936).

2^2195823 is an apocalyptic number.

2195823 is a deficient number, since it is larger than the sum of its proper divisors (1259153).

2195823 is a wasteful number, since it uses less digits than its factorization.

2195823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its digits is 4320, while the sum is 30.

The square root of 2195823 is about 1481.8309620196. The cubic root of 2195823 is about 129.9767808630.

The spelling of 2195823 in words is "two million, one hundred ninety-five thousand, eight hundred twenty-three".