13012331 has 4 divisors (see below), whose sum is σ = 13032912. Its totient is φ = 12991752.

The previous prime is 13012309. The next prime is 13012333. The reversal of 13012331 is 13321031.

13012331 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 an emirpimes, since its reverse is a distinct semiprime: 13321031 = 643 ⋅20717.

It is a cyclic number.

It is not a de Polignac number, because 13012331 - 2²² = 8818027 is a prime.

It is a super-2 number, since 2×13012331² = 338641516107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13012333) 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, 9311 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (3258228).

Almost surely, 2^13012331 is an apocalyptic number.

13012331 is a deficient number, since it is larger than the sum of its proper divisors (20581).

13012331 is an equidigital number, since it uses as much as digits as its factorization.

13012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20580.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13012331 is about 3607.2608721854. The cubic root of 13012331 is about 235.2077896579.

Adding to 13012331 its reverse (13321031), we get a palindrome (26333362).

The spelling of 13012331 in words is "thirteen million, twelve thousand, three hundred thirty-one".