13366221 has 8 divisors (see below), whose sum is σ = 19441824. Its totient is φ = 8100720.

The previous prime is 13366201. The next prime is 13366271. The reversal of 13366221 is 12266331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13366221 - 2¹⁰ = 13365197 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13366191 and 13366200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13366201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202486 + ... + 202551.

It is an arithmetic number, because the mean of its divisors is an integer number (2430228).

Almost surely, 2^13366221 is an apocalyptic number.

13366221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13366221 is a deficient number, since it is larger than the sum of its proper divisors (6075603).

13366221 is a wasteful number, since it uses less digits than its factorization.

13366221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405051.

The product of its digits is 1296, while the sum is 24.

The square root of 13366221 is about 3655.9842723951. The cubic root of 13366221 is about 237.3210234238.

It can be divided in two parts, 1336 and 6221, that added together give a palindrome (7557).

The spelling of 13366221 in words is "thirteen million, three hundred sixty-six thousand, two hundred twenty-one".