13081530 has 96 divisors (see below), whose sum is σ = 39890880. Its totient is φ = 2714880.

The previous prime is 13081507. The next prime is 13081559. The reversal of 13081530 is 3518031.

It is a happy number.

It is a super-2 number, since 2×13081530² = 342252854281800, which contains 22 as substring.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13081497 and 13081506.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15766 + ... + 16574.

It is an arithmetic number, because the mean of its divisors is an integer number (415530).

Almost surely, 2^13081530 is an apocalyptic number.

13081530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13081530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19945440).

13081530 is an abundant number, since it is smaller than the sum of its proper divisors (26809350).

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

13081530 is a wasteful number, since it uses less digits than its factorization.

13081530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13081530 is about 3616.8397808031. The cubic root of 13081530 is about 235.6239942779.

Adding to 13081530 its reverse (3518031), we get a palindrome (16599561).

The spelling of 13081530 in words is "thirteen million, eighty-one thousand, five hundred thirty".