13216040 has 32 divisors (see below), whose sum is σ = 29933280. Its totient is φ = 5251392.

The previous prime is 13216031. The next prime is 13216051. The reversal of 13216040 is 4061231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (935415).

Almost surely, 2^13216040 is an apocalyptic number.

13216040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13216040 is an abundant number, since it is smaller than the sum of its proper divisors (16717240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13216040 is a wasteful number, since it uses less digits than its factorization.

13216040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2197 counting only the distinct ones).

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

The square root of 13216040 is about 3635.3871870820. The cubic root of 13216040 is about 236.4288382072.

Adding to 13216040 its reverse (4061231), we get a palindrome (17277271).

The spelling of 13216040 in words is "thirteen million, two hundred sixteen thousand, forty".