2311320 has 128 divisors (see below), whose sum is σ = 8087040. Its totient is φ = 522240.

The previous prime is 2311289. The next prime is 2311321. The reversal of 2311320 is 231132.

It is a happy number.

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 = 2311296 and 2311305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22389 + ... + 22491.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2^2311320 is an apocalyptic number.

2311320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4043520).

2311320 is an abundant number, since it is smaller than the sum of its proper divisors (5775720).

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

2311320 is a wasteful number, since it uses less digits than its factorization.

2311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2311320 is about 1520.3026014580. The cubic root of 2311320 is about 132.2168153940.

Adding to 2311320 its reverse (231132), we get a palindrome (2542452).

It can be divided in two parts, 231 and 1320, that added together give a palindrome (1551).

The spelling of 2311320 in words is "two million, three hundred eleven thousand, three hundred twenty".