2164813 has 4 divisors (see below), whose sum is σ = 2474080. Its totient is φ = 1855548.

The previous prime is 2164807. The next prime is 2164817. The reversal of 2164813 is 3184612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164813 is a prime.

2164813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154623 + ... + 154636.

It is an arithmetic number, because the mean of its divisors is an integer number (618520).

2^2164813 is an apocalyptic number.

It is an amenable number.

2164813 is a deficient number, since it is larger than the sum of its proper divisors (309267).

2164813 is an equidigital number, since it uses as much as digits as its factorization.

2164813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309266.

The product of its digits is 1152, while the sum is 25.

The square root of 2164813 is about 1471.3303503972. The cubic root of 2164813 is about 129.3620221604.

The spelling of 2164813 in words is "two million, one hundred sixty-four thousand, eight hundred thirteen".