2196823 has 4 divisors (see below), whose sum is σ = 2199808. Its totient is φ = 2193840.

The previous prime is 2196809. The next prime is 2196829. The reversal of 2196823 is 3286912.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2196823 - 2¹⁷ = 2065751 is a prime.

It is an Ulam number.

It is a Duffinian number.

2196823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (549952).

2^2196823 is an apocalyptic number.

2196823 is a deficient number, since it is larger than the sum of its proper divisors (2985).

2196823 is a wasteful number, since it uses less digits than its factorization.

2196823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984.

The product of its digits is 5184, while the sum is 31.

The square root of 2196823 is about 1482.1683440149. The cubic root of 2196823 is about 129.9965087820.

The spelling of 2196823 in words is "two million, one hundred ninety-six thousand, eight hundred twenty-three".