13168221 has 16 divisors (see below), whose sum is σ = 19517760. Its totient is φ = 7829120.

The previous prime is 13168201. The next prime is 13168231. The reversal of 13168221 is 12286131.

It is a cyclic number.

It is not a de Polignac number, because 13168221 - 2⁹ = 13167709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13168191 and 13168200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13168201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (1219860).

Almost surely, 2^13168221 is an apocalyptic number.

13168221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13168221 is a deficient number, since it is larger than the sum of its proper divisors (6349539).

13168221 is a wasteful number, since it uses less digits than its factorization.

13168221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7596.

The product of its digits is 576, while the sum is 24.

The square root of 13168221 is about 3628.8043485424. The cubic root of 13168221 is about 236.1433403366.

The spelling of 13168221 in words is "thirteen million, one hundred sixty-eight thousand, two hundred twenty-one".