13131205 has 8 divisors (see below), whose sum is σ = 15806232. Its totient is φ = 10472448.

The previous prime is 13131203. The next prime is 13131233. The reversal of 13131205 is 50213131.

13131205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 9941409 = 1786^2 + 3153^2 .

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 13131205 - 2¹ = 13131203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212 + ... + 5581.

It is an arithmetic number, because the mean of its divisors is an integer number (1975779).

Almost surely, 2^13131205 is an apocalyptic number.

It is an amenable number.

13131205 is a deficient number, since it is larger than the sum of its proper divisors (2675027).

13131205 is an equidigital number, since it uses as much as digits as its factorization.

13131205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8135.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13131205 is about 3623.7004567155. The cubic root of 13131205 is about 235.9218655927.

Adding to 13131205 its reverse (50213131), we get a palindrome (63344336).

The spelling of 13131205 in words is "thirteen million, one hundred thirty-one thousand, two hundred five".