13522143 has 4 divisors (see below), whose sum is σ = 18029528. Its totient is φ = 9014760.

The previous prime is 13522133. The next prime is 13522147. The reversal of 13522143 is 34122531.

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

It is not a de Polignac number, because 13522143 - 2⁶ = 13522079 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 (13522147) 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, 2253688 + ... + 2253693.

It is an arithmetic number, because the mean of its divisors is an integer number (4507382).

Almost surely, 2^13522143 is an apocalyptic number.

13522143 is a deficient number, since it is larger than the sum of its proper divisors (4507385).

13522143 is an equidigital number, since it uses as much as digits as its factorization.

13522143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507384.

The product of its digits is 720, while the sum is 21.

The square root of 13522143 is about 3677.2466602065. The cubic root of 13522143 is about 238.2402712069.

Adding to 13522143 its reverse (34122531), we get a palindrome (47644674).

The spelling of 13522143 in words is "thirteen million, five hundred twenty-two thousand, one hundred forty-three".