13213212 has 48 divisors (see below), whose sum is σ = 32672640. Its totient is φ = 4148928.

The previous prime is 13213159. The next prime is 13213229. The reversal of 13213212 is 21231231.

13213212 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13213191 and 13213200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14523 + ... + 15405.

It is an arithmetic number, because the mean of its divisors is an integer number (680680).

Almost surely, 2^13213212 is an apocalyptic number.

13213212 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 13213212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16336320).

13213212 is an abundant number, since it is smaller than the sum of its proper divisors (19459428).

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

13213212 is a wasteful number, since it uses less digits than its factorization.

13213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 960 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 13213212 is about 3634.9982118290. The cubic root of 13213212 is about 236.4119731339.

Adding to 13213212 its reverse (21231231), we get a palindrome (34444443).

The spelling of 13213212 in words is "thirteen million, two hundred thirteen thousand, two hundred twelve".