13216061 has 4 divisors (see below), whose sum is σ = 13284732. Its totient is φ = 13147392.

The previous prime is 13216057. The next prime is 13216069. The reversal of 13216061 is 16061231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16061231 = 43 ⋅373517.

It can be written as a sum of positive squares in 2 ways, for example, as 6220036 + 6996025 = 2494^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 13216061 - 2² = 13216057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216069) 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, 34046 + ... + 34431.

It is an arithmetic number, because the mean of its divisors is an integer number (3321183).

Almost surely, 2^13216061 is an apocalyptic number.

It is an amenable number.

13216061 is a deficient number, since it is larger than the sum of its proper divisors (68671).

13216061 is an equidigital number, since it uses as much as digits as its factorization.

13216061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68670.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13216061 is about 3635.3900753564. The cubic root of 13216061 is about 236.4289634339.

Adding to 13216061 its reverse (16061231), we get a palindrome (29277292).

The spelling of 13216061 in words is "thirteen million, two hundred sixteen thousand, sixty-one".