13211312 has 20 divisors (see below), whose sum is σ = 27103176. Its totient is φ = 6216960.

The previous prime is 13211311. The next prime is 13211323. The reversal of 13211312 is 21311231.

It is a super-2 number, since 2×13211312² = 349077529522688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13211311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24014 + ... + 24557.

Almost surely, 2^13211312 is an apocalyptic number.

It is an amenable number.

13211312 is an abundant number, since it is smaller than the sum of its proper divisors (13891864).

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

13211312 is a wasteful number, since it uses less digits than its factorization.

13211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48596 (or 48590 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

The square root of 13211312 is about 3634.7368542991. The cubic root of 13211312 is about 236.4006409340.

Adding to 13211312 its reverse (21311231), we get a palindrome (34522543).

The spelling of 13211312 in words is "thirteen million, two hundred eleven thousand, three hundred twelve".