13321031 has 4 divisors (see below), whose sum is σ = 13342392. Its totient is φ = 13299672.

The previous prime is 13321027. The next prime is 13321051. The reversal of 13321031 is 13012331.

13321031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13012331 = 653 ⋅19927.

It is a cyclic number.

It is not a de Polignac number, because 13321031 - 2² = 13321027 is a prime.

It is a super-2 number, since 2×13321031² = 354899733805922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13320997 and 13321015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321051) 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, 9716 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (3335598).

Almost surely, 2^13321031 is an apocalyptic number.

13321031 is a deficient number, since it is larger than the sum of its proper divisors (21361).

13321031 is an equidigital number, since it uses as much as digits as its factorization.

13321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21360.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13321031 is about 3649.7987615758. The cubic root of 13321031 is about 237.0532677125.

Adding to 13321031 its reverse (13012331), we get a palindrome (26333362).

The spelling of 13321031 in words is "thirteen million, three hundred twenty-one thousand, thirty-one".