13216971 has 8 divisors (see below), whose sum is σ = 17639424. Its totient is φ = 8802920.

The previous prime is 13216969. The next prime is 13216991. The reversal of 13216971 is 17961231.

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

It is a cyclic number.

It is not a de Polignac number, because 13216971 - 2¹ = 13216969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13216901) 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 7 ways as a sum of consecutive naturals, for example, 5206 + ... + 7316.

It is an arithmetic number, because the mean of its divisors is an integer number (2204928).

Almost surely, 2^13216971 is an apocalyptic number.

13216971 is a deficient number, since it is larger than the sum of its proper divisors (4422453).

13216971 is a wasteful number, since it uses less digits than its factorization.

13216971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201.

The product of its digits is 2268, while the sum is 30.

The square root of 13216971 is about 3635.5152317106. The cubic root of 13216971 is about 236.4343897966.

The spelling of 13216971 in words is "thirteen million, two hundred sixteen thousand, nine hundred seventy-one".