13216004 has 12 divisors (see below), whose sum is σ = 24488604. Its totient is φ = 6219264.

The previous prime is 13216003. The next prime is 13216009. The reversal of 13216004 is 40061231.

It can be written as a sum of positive squares in 2 ways, for example, as 8584900 + 4631104 = 2930^2 + 2152^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (13216003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97109 + ... + 97244.

It is an arithmetic number, because the mean of its divisors is an integer number (2040717).

Almost surely, 2^13216004 is an apocalyptic number.

It is an amenable number.

13216004 is a deficient number, since it is larger than the sum of its proper divisors (11272600).

13216004 is a wasteful number, since it uses less digits than its factorization.

13216004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194374 (or 194372 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 13216004 is about 3635.3822357491. The cubic root of 13216004 is about 236.4286235326.

Adding to 13216004 its reverse (40061231), we get a palindrome (53277235).

The spelling of 13216004 in words is "thirteen million, two hundred sixteen thousand, four".