13533421243 has 4 divisors (see below), whose sum is σ = 13579610688. Its totient is φ = 13487231800.

The previous prime is 13533421219. The next prime is 13533421247. The reversal of 13533421243 is 34212433531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13533421243 - 2⁵ = 13533421211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13533421247) 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, 23094283 + ... + 23094868.

It is an arithmetic number, because the mean of its divisors is an integer number (3394902672).

Almost surely, 2^13533421243 is an apocalyptic number.

13533421243 is a deficient number, since it is larger than the sum of its proper divisors (46189445).

13533421243 is an equidigital number, since it uses as much as digits as its factorization.

13533421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46189444.

The product of its digits is 25920, while the sum is 31.

Adding to 13533421243 its reverse (34212433531), we get a palindrome (47745854774).

The spelling of 13533421243 in words is "thirteen billion, five hundred thirty-three million, four hundred twenty-one thousand, two hundred forty-three".