13522053421 has 4 divisors (see below), whose sum is σ = 13851859644. Its totient is φ = 13192247200.

The previous prime is 13522053409. The next prime is 13522053439. The reversal of 13522053421 is 12435022531.

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 872552521 + 12649500900 = 29539^2 + 112470^2 .

It is a cyclic number.

It is not a de Polignac number, because 13522053421 - 2¹⁵ = 13522020653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13522053421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13522053221) 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, 164903050 + ... + 164903131.

It is an arithmetic number, because the mean of its divisors is an integer number (3462964911).

Almost surely, 2^13522053421 is an apocalyptic number.

It is an amenable number.

13522053421 is a deficient number, since it is larger than the sum of its proper divisors (329806223).

13522053421 is an equidigital number, since it uses as much as digits as its factorization.

13522053421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329806222.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 13522053421 its reverse (12435022531), we get a palindrome (25957075952).

The spelling of 13522053421 in words is "thirteen billion, five hundred twenty-two million, fifty-three thousand, four hundred twenty-one".