13231211 has 4 divisors (see below), whose sum is σ = 15121392. Its totient is φ = 11341032.

The previous prime is 13231189. The next prime is 13231247. The reversal of 13231211 is 11213231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13231211 - 2⁶ = 13231147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945080 + ... + 945093.

It is an arithmetic number, because the mean of its divisors is an integer number (3780348).

Almost surely, 2^13231211 is an apocalyptic number.

13231211 is a deficient number, since it is larger than the sum of its proper divisors (1890181).

13231211 is an equidigital number, since it uses as much as digits as its factorization.

13231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890180.

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

The square root of 13231211 is about 3637.4731614130. The cubic root of 13231211 is about 236.5192710020.

Adding to 13231211 its reverse (11213231), we get a palindrome (24444442).

The spelling of 13231211 in words is "thirteen million, two hundred thirty-one thousand, two hundred eleven".