13081081 has 4 divisors (see below), whose sum is σ = 14087332. Its totient is φ = 12074832.

The previous prime is 13081031. The next prime is 13081093. The reversal of 13081081 is 18018031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18018031 = 3613 ⋅4987.

It can be written as a sum of positive squares in 2 ways, for example, as 2131600 + 10949481 = 1460^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 13081081 - 2¹³ = 13072889 is a prime.

It is a super-2 number, since 2×13081081² = 342229360257122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13081031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503106 + ... + 503131.

It is an arithmetic number, because the mean of its divisors is an integer number (3521833).

Almost surely, 2^13081081 is an apocalyptic number.

It is an amenable number.

13081081 is a deficient number, since it is larger than the sum of its proper divisors (1006251).

13081081 is a wasteful number, since it uses less digits than its factorization.

13081081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006250.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 13081081 is about 3616.7777095088. Note that the first 4 decimals coincide. The cubic root of 13081081 is about 235.6212984570.

The spelling of 13081081 in words is "thirteen million, eighty-one thousand, eighty-one".