13522161 has 4 divisors (see below), whose sum is σ = 18029552. Its totient is φ = 9014772.

The previous prime is 13522147. The next prime is 13522177. The reversal of 13522161 is 16122531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16122531 = 3 ⋅5374177.

It is not a de Polignac number, because 13522161 - 2¹⁵ = 13489393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13542161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253691 + ... + 2253696.

It is an arithmetic number, because the mean of its divisors is an integer number (4507388).

Almost surely, 2^13522161 is an apocalyptic number.

It is an amenable number.

13522161 is a deficient number, since it is larger than the sum of its proper divisors (4507391).

13522161 is an equidigital number, since it uses as much as digits as its factorization.

13522161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507390.

The product of its digits is 360, while the sum is 21.

The square root of 13522161 is about 3677.2491076891. The cubic root of 13522161 is about 238.2403769180.

Adding to 13522161 its reverse (16122531), we get a palindrome (29644692).

The spelling of 13522161 in words is "thirteen million, five hundred twenty-two thousand, one hundred sixty-one".