13322221 has 12 divisors (see below), whose sum is σ = 15283296.
Its totient is φ = 11582120.
The previous prime is 13322209. The next prime is 13322233. The reversal of 13322221 is 12222331.
Adding to 13322221 its reverse (12222331), we get a palindrome (25544552).
It can be divided in two parts, 1332 and 2221, that added together give a palindrome (3553).
It is an interprime number because it is at equal distance from previous prime (13322209) and next prime (13322233).
It is not a de Polignac number, because 13322221 - 25 = 13322189 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 13322195 and 13322204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13322821) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390 + ... + 5176.
It is an arithmetic number, because the mean of its divisors is an integer number (1273608).
Almost surely, 213322221 is an apocalyptic number.
13322221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
13322221 is a deficient number, since it is larger than the sum of its proper divisors (1961075).
13322221 is a wasteful number, since it uses less digits than its factorization.
13322221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4832 (or 4821 counting only the distinct ones).
The product of its digits is 144, while the sum is 16.
The square root of 13322221 is about 3649.9617806218.
The cubic root of 13322221 is about 237.0603263500.
The spelling of 13322221 in words is "thirteen million, three hundred twenty-two thousand, two hundred twenty-one".