13161015 has 64 divisors (see below), whose sum is σ = 28185600. Its totient is φ = 5692032.

The previous prime is 13160993. The next prime is 13161017. The reversal of 13161015 is 51016131.

13161015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

13161015 is a nontrivial binomial coefficient, being equal to C(5131, 2).

It is not a de Polignac number, because 13161015 - 2⁷ = 13160887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17589 + ... + 18321.

It is an arithmetic number, because the mean of its divisors is an integer number (440400).

Almost surely, 2^13161015 is an apocalyptic number.

13161015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13161015 is the 5130-th triangular number.

13161015 is an abundant number, since it is smaller than the sum of its proper divisors (15024585).

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

13161015 is a wasteful number, since it uses less digits than its factorization.

13161015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 13161015 is about 3627.8113236496. The cubic root of 13161015 is about 236.1002578428.

Adding to 13161015 its reverse (51016131), we get a palindrome (64177146).

It can be divided in two parts, 13 and 161015, that added together give a triangular number (161028 = T₅₆₇).

The spelling of 13161015 in words is "thirteen million, one hundred sixty-one thousand, fifteen".