3313821 has 12 divisors (see below), whose sum is σ = 5140032. Its totient is φ = 1893528.

The previous prime is 3313787. The next prime is 3313823. The reversal of 3313821 is 1283133.

It is a happy number.

It is not a de Polignac number, because 3313821 - 2¹⁸ = 3051677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3313823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11125 + ... + 11418.

It is an arithmetic number, because the mean of its divisors is an integer number (428336).

Almost surely, 2^3313821 is an apocalyptic number.

It is an amenable number.

3313821 is a deficient number, since it is larger than the sum of its proper divisors (1826211).

3313821 is a wasteful number, since it uses less digits than its factorization.

3313821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22560 (or 22553 counting only the distinct ones).

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

The square root of 3313821 is about 1820.3903427562. The cubic root of 3313821 is about 149.0881120809.

Adding to 3313821 its reverse (1283133), we get a palindrome (4596954).

The spelling of 3313821 in words is "three million, three hundred thirteen thousand, eight hundred twenty-one".