13216580 has 24 divisors (see below), whose sum is σ = 29890392. Its totient is φ = 4879872.

The previous prime is 13216561. The next prime is 13216583. The reversal of 13216580 is 8561231.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 13017664 = 446^2 + 3608^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25157 + ... + 25676.

It is an arithmetic number, because the mean of its divisors is an integer number (1245433).

Almost surely, 2^13216580 is an apocalyptic number.

13216580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13216580 is an abundant number, since it is smaller than the sum of its proper divisors (16673812).

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

13216580 is a wasteful number, since it uses less digits than its factorization.

13216580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50855 (or 50853 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 13216580 is about 3635.4614562666. The cubic root of 13216580 is about 236.4320582801.

The spelling of 13216580 in words is "thirteen million, two hundred sixteen thousand, five hundred eighty".