13196221 has 2 divisors, whose sum is σ = 13196222. Its totient is φ = 13196220.

The previous prime is 13196201. The next prime is 13196231. The reversal of 13196221 is 12269131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 19321 = 3630^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 13196221 - 2⁷ = 13196093 is a prime.

It is equal to p₈₆₁₁₆₃ and since 13196221 and 861163 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13196201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6598110 + 6598111.

It is an arithmetic number, because the mean of its divisors is an integer number (6598111).

Almost surely, 2^13196221 is an apocalyptic number.

It is an amenable number.

13196221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13196221 is an equidigital number, since it uses as much as digits as its factorization.

13196221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 13196221 is about 3632.6603199308. The cubic root of 13196221 is about 236.3105948355.

The spelling of 13196221 in words is "thirteen million, one hundred ninety-six thousand, two hundred twenty-one".