13033281 has 4 divisors (see below), whose sum is σ = 17377712. Its totient is φ = 8688852.

The previous prime is 13033261. The next prime is 13033289. The reversal of 13033281 is 18233031.

It is a happy number.

13033281 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18233031 = 3 ⋅6077677.

It is not a de Polignac number, because 13033281 - 2¹¹ = 13031233 is a prime.

It is a super-2 number, since 2×13033281² = 339732827249922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13033289) 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, 2172211 + ... + 2172216.

It is an arithmetic number, because the mean of its divisors is an integer number (4344428).

Almost surely, 2^13033281 is an apocalyptic number.

It is an amenable number.

13033281 is a deficient number, since it is larger than the sum of its proper divisors (4344431).

13033281 is an equidigital number, since it uses as much as digits as its factorization.

13033281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344430.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13033281 is about 3610.1635697015. The cubic root of 13033281 is about 235.3339510417. Note that the first 3 decimals are identical.

It can be divided in two parts, 130 and 33281, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 13033281 in words is "thirteen million, thirty-three thousand, two hundred eighty-one".