13081615 has 8 divisors (see below), whose sum is σ = 15735600. Its totient is φ = 10440192.

The previous prime is 13081613. The next prime is 13081631. The reversal of 13081615 is 51618031.

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 13081615 - 2¹ = 13081613 is a prime.

It is a super-2 number, since 2×13081615² = 342257302016450, which contains 22 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 13081615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081613) 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, 669 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (1966950).

Almost surely, 2^13081615 is an apocalyptic number.

13081615 is a deficient number, since it is larger than the sum of its proper divisors (2653985).

13081615 is an equidigital number, since it uses as much as digits as its factorization.

13081615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 13081615 is about 3616.8515313737. The cubic root of 13081615 is about 235.6245046157.

Adding to 13081615 its reverse (51618031), we get a palindrome (64699646).

The spelling of 13081615 in words is "thirteen million, eighty-one thousand, six hundred fifteen".