13211231 has 4 divisors (see below), whose sum is σ = 14412264. Its totient is φ = 12010200.

The previous prime is 13211207. The next prime is 13211243.

13211231 is nontrivially palindromic in base 10.

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 13211231 - 2⁶ = 13211167 is a prime.

It is a super-2 number, since 2×13211231² = 349073249070722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600500 + ... + 600521.

It is an arithmetic number, because the mean of its divisors is an integer number (3603066).

Almost surely, 2^13211231 is an apocalyptic number.

13211231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13211231 is a deficient number, since it is larger than the sum of its proper divisors (1201033).

13211231 is a wasteful number, since it uses less digits than its factorization.

13211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201032.

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

The square root of 13211231 is about 3634.7257117972. The cubic root of 13211231 is about 236.4001578003.

It can be divided in two parts, 1321 and 1231, that added together give a palindrome (2552).

The spelling of 13211231 in words is "thirteen million, two hundred eleven thousand, two hundred thirty-one".