2321220 has 48 divisors (see below), whose sum is σ = 7092288. Its totient is φ = 562560.

The previous prime is 2321219. The next prime is 2321239. The reversal of 2321220 is 221232.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2321196 and 2321205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (147756).

2^2321220 is an apocalyptic number.

2321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2321220 is an abundant number, since it is smaller than the sum of its proper divisors (4771068).

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

2321220 is a wasteful number, since it uses less digits than its factorization.

2321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540 (or 3538 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2321220 is about 1523.5550531569. Note that the first 3 decimals coincide. The cubic root of 2321220 is about 132.4053198058.

Adding to 2321220 its sum of digits (12), we get a palindrome (2321232).

Adding to 2321220 its reverse (221232), we get a palindrome (2542452).

It can be divided in two parts, 23212 and 20, that added together give a palindrome (23232).

The spelling of 2321220 in words is "two million, three hundred twenty-one thousand, two hundred twenty".