13280331 has 4 divisors (see below), whose sum is σ = 17707112. Its totient is φ = 8853552.

The previous prime is 13280327. The next prime is 13280339. The reversal of 13280331 is 13308231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13280331 - 2² = 13280327 is a prime.

It is a super-2 number, since 2×13280331² = 352734382939122, 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 = 13280298 and 13280307.

It is not an unprimeable number, because it can be changed into a prime (13280339) 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 3 ways as a sum of consecutive naturals, for example, 2213386 + ... + 2213391.

It is an arithmetic number, because the mean of its divisors is an integer number (4426778).

Almost surely, 2^13280331 is an apocalyptic number.

13280331 is a deficient number, since it is larger than the sum of its proper divisors (4426781).

13280331 is an equidigital number, since it uses as much as digits as its factorization.

13280331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426780.

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

The square root of 13280331 is about 3644.2188463373. The cubic root of 13280331 is about 236.8115969618.

Adding to 13280331 its reverse (13308231), we get a palindrome (26588562).

The spelling of 13280331 in words is "thirteen million, two hundred eighty thousand, three hundred thirty-one".