13320312 has 64 divisors (see below), whose sum is σ = 35424000. Its totient is φ = 4164864.

The previous prime is 13320301. The next prime is 13320313. The reversal of 13320312 is 21302331.

It is a junction number, because it is equal to n+sod(n) for n = 13320291 and 13320300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32364 + ... + 32772.

It is an arithmetic number, because the mean of its divisors is an integer number (553500).

Almost surely, 2^13320312 is an apocalyptic number.

13320312 is a gapful number since it is divisible by the number (12) 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 13320312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17712000).

13320312 is an abundant number, since it is smaller than the sum of its proper divisors (22103688).

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

13320312 is a wasteful number, since it uses less digits than its factorization.

13320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13320312 is about 3649.7002616653. The cubic root of 13320312 is about 237.0490026681.

Adding to 13320312 its reverse (21302331), we get a palindrome (34622643).

The spelling of 13320312 in words is "thirteen million, three hundred twenty thousand, three hundred twelve".