13216091 has 8 divisors (see below), whose sum is σ = 15129600. Its totient is φ = 11308968.

The previous prime is 13216087. The next prime is 13216097. The reversal of 13216091 is 19061231.

It is a happy number.

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 13216091 - 2² = 13216087 is a prime.

It is a super-2 number, since 2×13216091² = 349330122640562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216097) 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, 4310 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (1891200).

Almost surely, 2^13216091 is an apocalyptic number.

13216091 is a deficient number, since it is larger than the sum of its proper divisors (1913509).

13216091 is an equidigital number, since it uses as much as digits as its factorization.

13216091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 13216091 is about 3635.3942014588. The cubic root of 13216091 is about 236.4291423290.

The spelling of 13216091 in words is "thirteen million, two hundred sixteen thousand, ninety-one".