2185919 has 2 divisors, whose sum is σ = 2185920. Its totient is φ = 2185918.

The previous prime is 2185913. The next prime is 2185921. The reversal of 2185919 is 9195812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2185919 - 2¹⁶ = 2120383 is a prime.

It is a super-2 number, since 2×2185919² = 9556483749122, which contains 22 as substring.

Together with 2185921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092959 + 1092960.

It is an arithmetic number, because the mean of its divisors is an integer number (1092960).

2^2185919 is an apocalyptic number.

2185919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185919 is an equidigital number, since it uses as much as digits as its factorization.

2185919 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 2185919 is about 1478.4853736172. The cubic root of 2185919 is about 129.7810713588.

The spelling of 2185919 in words is "two million, one hundred eighty-five thousand, nine hundred nineteen".