13520251133 has 4 divisors (see below), whose sum is σ = 13520558940. Its totient is φ = 13519943328.

The previous prime is 13520251127. The next prime is 13520251159. The reversal of 13520251133 is 33115202531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33115202531 = 5471 ⋅6052861.

It can be written as a sum of positive squares in 2 ways, for example, as 183927844 + 13336323289 = 13562^2 + 115483^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520251133 - 2²⁴ = 13503473917 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 (13520251103) 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, 74288 + ... + 180441.

It is an arithmetic number, because the mean of its divisors is an integer number (3380139735).

Almost surely, 2^13520251133 is an apocalyptic number.

It is an amenable number.

13520251133 is a deficient number, since it is larger than the sum of its proper divisors (307807).

13520251133 is an equidigital number, since it uses as much as digits as its factorization.

13520251133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307806.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13520251133 its reverse (33115202531), we get a palindrome (46635453664).

The spelling of 13520251133 in words is "thirteen billion, five hundred twenty million, two hundred fifty-one thousand, one hundred thirty-three".