13021313 has 4 divisors (see below), whose sum is σ = 13338948. Its totient is φ = 12703680.

The previous prime is 13021277. The next prime is 13021331. The reversal of 13021313 is 31312031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31312031 = 293 ⋅106867.

It can be written as a sum of positive squares in 2 ways, for example, as 3429904 + 9591409 = 1852^2 + 3097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021513) 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, 158756 + ... + 158837.

It is an arithmetic number, because the mean of its divisors is an integer number (3334737).

Almost surely, 2^13021313 is an apocalyptic number.

It is an amenable number.

13021313 is a deficient number, since it is larger than the sum of its proper divisors (317635).

13021313 is an equidigital number, since it uses as much as digits as its factorization.

13021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317634.

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

The square root of 13021313 is about 3608.5056463860. The cubic root of 13021313 is about 235.2618960399.

Adding to 13021313 its reverse (31312031), we get a palindrome (44333344).

The spelling of 13021313 in words is "thirteen million, twenty-one thousand, three hundred thirteen".