13212320 has 48 divisors (see below), whose sum is σ = 34056288. Its totient is φ = 4803840.

The previous prime is 13212307. The next prime is 13212337. The reversal of 13212320 is 2321231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13212295 and 13212304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (709506).

Almost surely, 2^13212320 is an apocalyptic number.

13212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212320 is an abundant number, since it is smaller than the sum of its proper divisors (20843968).

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

13212320 is a wasteful number, since it uses less digits than its factorization.

13212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7533 (or 7525 counting only the distinct ones).

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

The square root of 13212320 is about 3634.8755136868. The cubic root of 13212320 is about 236.4066530996.

Adding to 13212320 its reverse (2321231), we get a palindrome (15533551).

The spelling of 13212320 in words is "thirteen million, two hundred twelve thousand, three hundred twenty".