13105181 has 8 divisors (see below), whose sum is σ = 13908024. Its totient is φ = 12305920.

The previous prime is 13105177. The next prime is 13105189. The reversal of 13105181 is 18150131.

It can be written as a sum of positive squares in 4 ways, for example, as 502681 + 12602500 = 709^2 + 3550^2 .

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 13105181 - 2² = 13105177 is a prime.

It is a super-2 number, since 2×13105181² = 343491538085522, which 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 (13105189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12431 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (1738503).

Almost surely, 2^13105181 is an apocalyptic number.

It is an amenable number.

13105181 is a deficient number, since it is larger than the sum of its proper divisors (802843).

13105181 is a wasteful number, since it uses less digits than its factorization.

13105181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 13105181 is about 3620.1078713210. The cubic root of 13105181 is about 235.7659090745.

The spelling of 13105181 in words is "thirteen million, one hundred five thousand, one hundred eighty-one".