13103131 has 4 divisors (see below), whose sum is σ = 13110552. Its totient is φ = 13095712.

The previous prime is 13103087. The next prime is 13103147. The reversal of 13103131 is 13130131.

It is a happy number.

13103131 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13103131 - 2¹¹ = 13101083 is a prime.

It is a super-2 number, since 2×13103131² = 343384084006322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13103161) 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, 636 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (3277638).

Almost surely, 2^13103131 is an apocalyptic number.

13103131 is a deficient number, since it is larger than the sum of its proper divisors (7421).

13103131 is an equidigital number, since it uses as much as digits as its factorization.

13103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 13103131 is about 3619.8247195134. The cubic root of 13103131 is about 235.7536150737.

Adding to 13103131 its reverse (13130131), we get a palindrome (26233262).

Subtracting 13103131 from its reverse (13130131), we obtain a cube (27000 = 30³).

It can be divided in two parts, 13 and 103131, that multiplied together give a triangular number (1340703 = T₁₆₃₇).

The spelling of 13103131 in words is "thirteen million, one hundred three thousand, one hundred thirty-one".