13220171 has 4 divisors (see below), whose sum is σ = 13343832. Its totient is φ = 13096512.

The previous prime is 13220131. The next prime is 13220177. The reversal of 13220171 is 17102231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13220171 - 2¹⁸ = 12958027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61670 + ... + 61883.

It is an arithmetic number, because the mean of its divisors is an integer number (3335958).

Almost surely, 2^13220171 is an apocalyptic number.

13220171 is a deficient number, since it is larger than the sum of its proper divisors (123661).

13220171 is a wasteful number, since it uses less digits than its factorization.

13220171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123660.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 13220171 is about 3635.9553077561. The cubic root of 13220171 is about 236.4534695337.

The spelling of 13220171 in words is "thirteen million, two hundred twenty thousand, one hundred seventy-one".