13161331 has 8 divisors (see below), whose sum is σ = 13873680. Its totient is φ = 12466272.

The previous prime is 13161301. The next prime is 13161347. The reversal of 13161331 is 13316131.

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

It is a cyclic number.

It is not a de Polignac number, because 13161331 - 2¹⁹ = 12637043 is a prime.

It is a super-2 number, since 2×13161331² = 346441267383122, 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 = 13161299 and 13161308.

It is not an unprimeable number, because it can be changed into a prime (13161301) 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 7 ways as a sum of consecutive naturals, for example, 2745 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (1734210).

Almost surely, 2^13161331 is an apocalyptic number.

13161331 is a deficient number, since it is larger than the sum of its proper divisors (712349).

13161331 is an equidigital number, since it uses as much as digits as its factorization.

13161331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8645.

The product of its digits is 162, while the sum is 19.

The square root of 13161331 is about 3627.8548758185. The cubic root of 13161331 is about 236.1021474408.

Adding to 13161331 its reverse (13316131), we get a palindrome (26477462).

The spelling of 13161331 in words is "thirteen million, one hundred sixty-one thousand, three hundred thirty-one".