13316520 has 128 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 2991360.

The previous prime is 13316509. The next prime is 13316521. The reversal of 13316520 is 2561331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13316521) 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 31 ways as a sum of consecutive naturals, for example, 69625 + ... + 69815.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^13316520 is an apocalyptic number.

13316520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13316520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23224320).

13316520 is an abundant number, since it is smaller than the sum of its proper divisors (33132120).

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

13316520 is a wasteful number, since it uses less digits than its factorization.

13316520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13316520 is about 3649.1807299721. The cubic root of 13316520 is about 237.0265063199.

Adding to 13316520 its reverse (2561331), we get a palindrome (15877851).

It can be divided in two parts, 133 and 16520, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 13316520 in words is "thirteen million, three hundred sixteen thousand, five hundred twenty".