13530511205 has 4 divisors (see below), whose sum is σ = 16236613452. Its totient is φ = 10824408960.

The previous prime is 13530511201. The next prime is 13530511219. The reversal of 13530511205 is 50211503531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2399628196 + 11130883009 = 48986^2 + 105503^2 .

It is not a de Polignac number, because 13530511205 - 2² = 13530511201 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 (13530511201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353051116 + ... + 1353051125.

It is an arithmetic number, because the mean of its divisors is an integer number (4059153363).

Almost surely, 2^13530511205 is an apocalyptic number.

It is an amenable number.

13530511205 is a deficient number, since it is larger than the sum of its proper divisors (2706102247).

13530511205 is an equidigital number, since it uses as much as digits as its factorization.

13530511205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706102246.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 13530511205 in words is "thirteen billion, five hundred thirty million, five hundred eleven thousand, two hundred five".