13523421451 has 4 divisors (see below), whose sum is σ = 13525556472. Its totient is φ = 13521286432.

The previous prime is 13523421421. The next prime is 13523421467. The reversal of 13523421451 is 15412432531.

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 13523421451 - 2²⁹ = 12986550539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13523421421) 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, 1057981 + ... + 1070686.

It is an arithmetic number, because the mean of its divisors is an integer number (3381389118).

Almost surely, 2^13523421451 is an apocalyptic number.

13523421451 is a deficient number, since it is larger than the sum of its proper divisors (2135021).

13523421451 is an equidigital number, since it uses as much as digits as its factorization.

13523421451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135020.

The product of its digits is 14400, while the sum is 31.

Adding to 13523421451 its reverse (15412432531), we get a palindrome (28935853982).

The spelling of 13523421451 in words is "thirteen billion, five hundred twenty-three million, four hundred twenty-one thousand, four hundred fifty-one".