2805213 has 4 divisors (see below), whose sum is σ = 3740288. Its totient is φ = 1870140.

The previous prime is 2805203. The next prime is 2805227. The reversal of 2805213 is 3125082.

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 not a de Polignac number, because 2805213 - 2⁵ = 2805181 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 2805213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805203) 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, 467533 + ... + 467538.

It is an arithmetic number, because the mean of its divisors is an integer number (935072).

2^2805213 is an apocalyptic number.

It is an amenable number.

2805213 is a deficient number, since it is larger than the sum of its proper divisors (935075).

2805213 is an equidigital number, since it uses as much as digits as its factorization.

2805213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935074.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2805213 is about 1674.8770104100. The cubic root of 2805213 is about 141.0333908144.

The spelling of 2805213 in words is "two million, eight hundred five thousand, two hundred thirteen".