3231220 has 12 divisors (see below), whose sum is σ = 6785604. Its totient is φ = 1292480.

The previous prime is 3231211. The next prime is 3231227. The reversal of 3231220 is 221323.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1582564 + 1648656 = 1258^2 + 1284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3231220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231227) 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, 80761 + ... + 80800.

It is an arithmetic number, because the mean of its divisors is an integer number (565467).

Almost surely, 2^3231220 is an apocalyptic number.

It is an amenable number.

3231220 is an abundant number, since it is smaller than the sum of its proper divisors (3554384).

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

3231220 is a wasteful number, since it uses less digits than its factorization.

3231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161570 (or 161568 counting only the distinct ones).

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

The square root of 3231220 is about 1797.5594565966. The cubic root of 3231220 is about 147.8389409363.

Adding to 3231220 its reverse (221323), we get a palindrome (3452543).

The spelling of 3231220 in words is "three million, two hundred thirty-one thousand, two hundred twenty".