2162819 has 4 divisors (see below), whose sum is σ = 2178744. Its totient is φ = 2146896.

The previous prime is 2162813. The next prime is 2162821. The reversal of 2162819 is 9182612.

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

It is a cyclic number.

It is not a de Polignac number, because 2162819 - 2⁴ = 2162803 is a prime.

It is a super-2 number, since 2×2162819² = 9355572053522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2162791 and 2162800.

It is not an unprimeable number, because it can be changed into a prime (2162813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7757 + ... + 8030.

It is an arithmetic number, because the mean of its divisors is an integer number (544686).

2^2162819 is an apocalyptic number.

2162819 is a deficient number, since it is larger than the sum of its proper divisors (15925).

2162819 is a wasteful number, since it uses less digits than its factorization.

2162819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15924.

The product of its digits is 1728, while the sum is 29.

The square root of 2162819 is about 1470.6525762395. The cubic root of 2162819 is about 129.3222916909.

The spelling of 2162819 in words is "two million, one hundred sixty-two thousand, eight hundred nineteen".