12313220 has 12 divisors (see below), whose sum is σ = 25857804. Its totient is φ = 4925280.

The previous prime is 12313187. The next prime is 12313229. The reversal of 12313220 is 2231321.

It is a happy number.

12313220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3444736 + 8868484 = 1856^2 + 2978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12313195 and 12313204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12313229) 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, 307811 + ... + 307850.

It is an arithmetic number, because the mean of its divisors is an integer number (2154817).

Almost surely, 2^12313220 is an apocalyptic number.

12313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12313220 is an abundant number, since it is smaller than the sum of its proper divisors (13544584).

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

12313220 is a wasteful number, since it uses less digits than its factorization.

12313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615670 (or 615668 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12313220 is about 3509.0198061567. The cubic root of 12313220 is about 230.9176946088.

Adding to 12313220 its reverse (2231321), we get a palindrome (14544541).

The spelling of 12313220 in words is "twelve million, three hundred thirteen thousand, two hundred twenty".