2220312 has 32 divisors (see below), whose sum is σ = 5633280. Its totient is φ = 729120.

The previous prime is 2220311. The next prime is 2220331. The reversal of 2220312 is 2130222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053 + ... + 2355.

It is an arithmetic number, because the mean of its divisors is an integer number (176040).

2^2220312 is an apocalyptic number.

It is an amenable number.

2220312 is an abundant number, since it is smaller than the sum of its proper divisors (3412968).

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

2220312 is a wasteful number, since it uses less digits than its factorization.

2220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1379 counting only the distinct ones).

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

The square root of 2220312 is about 1490.0711392413. The cubic root of 2220312 is about 130.4581859842.

Adding to 2220312 its reverse (2130222), we get a palindrome (4350534).

The spelling of 2220312 in words is "two million, two hundred twenty thousand, three hundred twelve".