13524324421 has 4 divisors (see below), whose sum is σ = 13592976012. Its totient is φ = 13455672832.

The previous prime is 13524324419. The next prime is 13524324479. The reversal of 13524324421 is 12442342531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12442342531 = 71 ⋅175244261.

It can be written as a sum of positive squares in 2 ways, for example, as 13204308100 + 320016321 = 114910^2 + 17889^2 .

It is a cyclic number.

It is not a de Polignac number, because 13524324421 - 2¹ = 13524324419 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 (13524324491) 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, 34325500 + ... + 34325893.

It is an arithmetic number, because the mean of its divisors is an integer number (3398244003).

Almost surely, 2^13524324421 is an apocalyptic number.

It is an amenable number.

13524324421 is a deficient number, since it is larger than the sum of its proper divisors (68651591).

13524324421 is an equidigital number, since it uses as much as digits as its factorization.

13524324421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68651590.

The product of its digits is 23040, while the sum is 31.

Adding to 13524324421 its reverse (12442342531), we get a palindrome (25966666952).

The spelling of 13524324421 in words is "thirteen billion, five hundred twenty-four million, three hundred twenty-four thousand, four hundred twenty-one".