13183108981 has 4 divisors (see below), whose sum is σ = 15066410272. Its totient is φ = 11299807692.

The previous prime is 13183108957. The next prime is 13183109039. The reversal of 13183108981 is 18980138131.

13183108981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13183108981 - 2⁷ = 13183108853 is a prime.

It is a super-2 number, since 2×13183108981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13183108901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941650635 + ... + 941650648.

It is an arithmetic number, because the mean of its divisors is an integer number (3766602568).

Almost surely, 2^13183108981 is an apocalyptic number.

It is an amenable number.

13183108981 is a deficient number, since it is larger than the sum of its proper divisors (1883301291).

13183108981 is an equidigital number, since it uses as much as digits as its factorization.

13183108981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883301290.

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 13183108981 in words is "thirteen billion, one hundred eighty-three million, one hundred eight thousand, nine hundred eighty-one".