3213220 has 24 divisors (see below), whose sum is σ = 6781824. Its totient is φ = 1278816.

The previous prime is 3213163. The next prime is 3213233. The reversal of 3213220 is 223123.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3213220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6709 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (282576).

Almost surely, 2^3213220 is an apocalyptic number.

It is an amenable number.

3213220 is an abundant number, since it is smaller than the sum of its proper divisors (3568604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3213220 is a wasteful number, since it uses less digits than its factorization.

3213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3213220 is about 1792.5456758476. The cubic root of 3213220 is about 147.5639098705.

Adding to 3213220 its reverse (223123), we get a palindrome (3436343).

The spelling of 3213220 in words is "three million, two hundred thirteen thousand, two hundred twenty".