13281331 has 8 divisors (see below), whose sum is σ = 15393024. Its totient is φ = 11223240.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281331 is 13318231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13281331 - 2¹ = 13281329 is a prime.

It is a super-2 number, since 2×13281331² = 352787506263122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13281371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12865 + ... + 13858.

It is an arithmetic number, because the mean of its divisors is an integer number (1924128).

Almost surely, 2^13281331 is an apocalyptic number.

13281331 is a deficient number, since it is larger than the sum of its proper divisors (2111693).

13281331 is an equidigital number, since it uses as much as digits as its factorization.

13281331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26801.

The product of its digits is 432, while the sum is 22.

The square root of 13281331 is about 3644.3560473697. The cubic root of 13281331 is about 236.8175407306.

Adding to 13281331 its reverse (13318231), we get a palindrome (26599562).

The spelling of 13281331 in words is "thirteen million, two hundred eighty-one thousand, three hundred thirty-one".