13530205 has 16 divisors (see below), whose sum is σ = 17915184. Its totient is φ = 9745920.

The previous prime is 13530203. The next prime is 13530259. The reversal of 13530205 is 50203531.

It can be written as a sum of positive squares in 8 ways, for example, as 763876 + 12766329 = 874^2 + 3573^2 .

It is not a de Polignac number, because 13530205 - 2¹ = 13530203 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 (13530203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127 + ... + 5203.

It is an arithmetic number, because the mean of its divisors is an integer number (1119699).

Almost surely, 2^13530205 is an apocalyptic number.

It is an amenable number.

13530205 is a deficient number, since it is larger than the sum of its proper divisors (4384979).

13530205 is a wasteful number, since it uses less digits than its factorization.

13530205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 13530205 is about 3678.3426974658. The cubic root of 13530205 is about 238.2876086613.

Adding to 13530205 its reverse (50203531), we get a palindrome (63733736).

The spelling of 13530205 in words is "thirteen million, five hundred thirty thousand, two hundred five".