2331220 has 24 divisors (see below), whose sum is σ = 4926600. Its totient is φ = 926592.

The previous prime is 2331191. The next prime is 2331253. The reversal of 2331220 is 221332.

It is a happy number.

2331220 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 4 ways, for example, as 1085764 + 1245456 = 1042^2 + 1116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2331220.

It is a congruent number.

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, 4326 + ... + 4834.

It is an arithmetic number, because the mean of its divisors is an integer number (205275).

2^2331220 is an apocalyptic number.

2331220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2331220 is an abundant number, since it is smaller than the sum of its proper divisors (2595380).

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

2331220 is a wasteful number, since it uses less digits than its factorization.

2331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

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

The square root of 2331220 is about 1526.8333242368. The cubic root of 2331220 is about 132.5951849573.

Adding to 2331220 its reverse (221332), we get a palindrome (2552552).

It can be divided in two parts, 23312 and 20, that added together give a palindrome (23332).

The spelling of 2331220 in words is "two million, three hundred thirty-one thousand, two hundred twenty".