1306534243213 has 4 divisors (see below), whose sum is σ = 1306537125628. Its totient is φ = 1306531360800.

The previous prime is 1306534243163. The next prime is 1306534243253. The reversal of 1306534243213 is 3123424356031.

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 174976563204 + 1131557680009 = 418302^2 + 1063747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306534243213 - 2²⁹ = 1305997372301 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 (1306534243253) 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, 596106 + ... + 1722907.

It is an arithmetic number, because the mean of its divisors is an integer number (326634281407).

Almost surely, 2^{1306534243213} is an apocalyptic number.

It is an amenable number.

1306534243213 is a deficient number, since it is larger than the sum of its proper divisors (2882415).

1306534243213 is an equidigital number, since it uses as much as digits as its factorization.

1306534243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882414.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 1306534243213 its reverse (3123424356031), we get a palindrome (4429958599244).

The spelling of 1306534243213 in words is "one trillion, three hundred six billion, five hundred thirty-four million, two hundred forty-three thousand, two hundred thirteen".