13221522 has 16 divisors (see below), whose sum is σ = 29381280. Its totient is φ = 4407156.

The previous prime is 13221503. The next prime is 13221553. The reversal of 13221522 is 22512231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13221495 and 13221504.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 122368 + ... + 122475.

It is an arithmetic number, because the mean of its divisors is an integer number (1836330).

Almost surely, 2^13221522 is an apocalyptic number.

13221522 is an abundant number, since it is smaller than the sum of its proper divisors (16159758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221522 is a wasteful number, since it uses less digits than its factorization.

13221522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244854 (or 244848 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 13221522 is about 3636.1410863716. The cubic root of 13221522 is about 236.4615238358.

Adding to 13221522 its reverse (22512231), we get a palindrome (35733753).

The spelling of 13221522 in words is "thirteen million, two hundred twenty-one thousand, five hundred twenty-two".