13343521 has 4 divisors (see below), whose sum is σ = 14128452. Its totient is φ = 12558592.

The previous prime is 13343507. The next prime is 13343531. The reversal of 13343521 is 12534331.

13343521 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: 12534331 = 647 ⋅19373.

It can be written as a sum of positive squares in 2 ways, for example, as 8785296 + 4558225 = 2964^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 13343521 - 2⁵ = 13343489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13343492 and 13343501.

It is not an unprimeable number, because it can be changed into a prime (13343531) 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, 392440 + ... + 392473.

It is an arithmetic number, because the mean of its divisors is an integer number (3532113).

Almost surely, 2^13343521 is an apocalyptic number.

It is an amenable number.

13343521 is a deficient number, since it is larger than the sum of its proper divisors (784931).

13343521 is an equidigital number, since it uses as much as digits as its factorization.

13343521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784930.

The product of its digits is 1080, while the sum is 22.

The square root of 13343521 is about 3652.8784540414. The cubic root of 13343521 is about 237.1865989963.

Adding to 13343521 its reverse (12534331), we get a palindrome (25877852).

The spelling of 13343521 in words is "thirteen million, three hundred forty-three thousand, five hundred twenty-one".