3213813 has 16 divisors (see below), whose sum is σ = 4571136. Its totient is φ = 2003760.

The previous prime is 3213811. The next prime is 3213827. The reversal of 3213813 is 3183123.

It is a happy number.

3213813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3213813 - 2¹ = 3213811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3213813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2748 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (285696).

Almost surely, 2^3213813 is an apocalyptic number.

It is an amenable number.

3213813 is a deficient number, since it is larger than the sum of its proper divisors (1357323).

3213813 is a wasteful number, since it uses less digits than its factorization.

3213813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064.

The product of its digits is 432, while the sum is 21.

The square root of 3213813 is about 1792.7110754385. The cubic root of 3213813 is about 147.5729869558.

Adding to 3213813 its reverse (3183123), we get a palindrome (6396936).

The spelling of 3213813 in words is "three million, two hundred thirteen thousand, eight hundred thirteen".