13231212 has 24 divisors (see below), whose sum is σ = 30942912. Its totient is φ = 4400400.

The previous prime is 13231189. The next prime is 13231247. The reversal of 13231212 is 21213231.

13231212 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 = 13231191 and 13231200.

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, 5887 + ... + 7817.

It is an arithmetic number, because the mean of its divisors is an integer number (1289288).

Almost surely, 2^13231212 is an apocalyptic number.

13231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13231212 is an abundant number, since it is smaller than the sum of its proper divisors (17711700).

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

13231212 is a wasteful number, since it uses less digits than its factorization.

13231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509 (or 2507 counting only the distinct ones).

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

The square root of 13231212 is about 3637.4732988711. The cubic root of 13231212 is about 236.5192769606.

Adding to 13231212 its reverse (21213231), we get a palindrome (34444443).

The spelling of 13231212 in words is "thirteen million, two hundred thirty-one thousand, two hundred twelve".