13138181 has 8 divisors (see below), whose sum is σ = 15164544. Its totient is φ = 11149200.

The previous prime is 13138159. The next prime is 13138183. The reversal of 13138181 is 18183131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13138181 is a prime.

It is a super-2 number, since 2×13138181² = 345223599977522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13138181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138183) 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, 8585 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (1895568).

Almost surely, 2^13138181 is an apocalyptic number.

It is an amenable number.

13138181 is a deficient number, since it is larger than the sum of its proper divisors (2026363).

13138181 is a wasteful number, since it uses less digits than its factorization.

13138181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18691.

The product of its digits is 576, while the sum is 26.

The square root of 13138181 is about 3624.6628808760. The cubic root of 13138181 is about 235.9636363105.

The spelling of 13138181 in words is "thirteen million, one hundred thirty-eight thousand, one hundred eighty-one".