13175221 has 6 divisors (see below), whose sum is σ = 13996130. Its totient is φ = 12399936.

The previous prime is 13175191. The next prime is 13175233. The reversal of 13175221 is 12257131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3478225 + 9696996 = 1865^2 + 3114^2 .

It is not a de Polignac number, because 13175221 - 2⁹ = 13174709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13175192 and 13175201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13175291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22506 + ... + 23083.

Almost surely, 2^13175221 is an apocalyptic number.

It is an amenable number.

13175221 is a deficient number, since it is larger than the sum of its proper divisors (820909).

13175221 is an equidigital number, since it uses as much as digits as its factorization.

13175221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45623 (or 45606 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 13175221 is about 3629.7687254149. The cubic root of 13175221 is about 236.1851761717.

The spelling of 13175221 in words is "thirteen million, one hundred seventy-five thousand, two hundred twenty-one".