2195819 has 2 divisors, whose sum is σ = 2195820. Its totient is φ = 2195818.

The previous prime is 2195801. The next prime is 2195827. The reversal of 2195819 is 9185912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2195819 - 2⁸ = 2195563 is a prime.

It is a super-2 number, since 2×2195819² = 9643242161522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2195899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097909 + 1097910.

It is an arithmetic number, because the mean of its divisors is an integer number (1097910).

2^2195819 is an apocalyptic number.

2195819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2195819 is an equidigital number, since it uses as much as digits as its factorization.

2195819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 35.

The square root of 2195819 is about 1481.8296123374. The cubic root of 2195819 is about 129.9767019393.

The spelling of 2195819 in words is "two million, one hundred ninety-five thousand, eight hundred nineteen".