13216651 has 16 divisors (see below), whose sum is σ = 15934464. Its totient is φ = 10717344.

The previous prime is 13216639. The next prime is 13216661. The reversal of 13216651 is 15661231.

It is a cyclic number.

It is not a de Polignac number, because 13216651 - 2¹⁵ = 13183883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13216601) 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 15 ways as a sum of consecutive naturals, for example, 16185 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (995904).

Almost surely, 2^13216651 is an apocalyptic number.

13216651 is a deficient number, since it is larger than the sum of its proper divisors (2717813).

13216651 is a wasteful number, since it uses less digits than its factorization.

13216651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930.

The product of its digits is 1080, while the sum is 25.

The square root of 13216651 is about 3635.4712211761. The cubic root of 13216651 is about 236.4324816535.

Adding to 13216651 its reverse (15661231), we get a palindrome (28877882).

The spelling of 13216651 in words is "thirteen million, two hundred sixteen thousand, six hundred fifty-one".