13016521 has 8 divisors (see below), whose sum is σ = 15128640. Its totient is φ = 10967568.

The previous prime is 13016519. The next prime is 13016561. The reversal of 13016521 is 12561031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13016521 - 2¹ = 13016519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13016561) 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 7 ways as a sum of consecutive naturals, for example, 15346 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (1891080).

Almost surely, 2^13016521 is an apocalyptic number.

It is an amenable number.

13016521 is a deficient number, since it is larger than the sum of its proper divisors (2112119).

13016521 is an equidigital number, since it uses as much as digits as its factorization.

13016521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31583.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 13016521 is about 3607.8415985184. The cubic root of 13016521 is about 235.2330327620.

Adding to 13016521 its reverse (12561031), we get a palindrome (25577552).

The spelling of 13016521 in words is "thirteen million, sixteen thousand, five hundred twenty-one".