13382181 has 6 divisors (see below), whose sum is σ = 19329830. Its totient is φ = 8921448.

The previous prime is 13382167. The next prime is 13382183. The reversal of 13382181 is 18128331.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 893025 = 3534^2 + 945^2 .

It is not a de Polignac number, because 13382181 - 2¹⁹ = 12857893 is a prime.

It is a super-2 number, since 2×13382181² = 358165536633522, 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 (13382183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743446 + ... + 743463.

Almost surely, 2^13382181 is an apocalyptic number.

It is an amenable number.

13382181 is a deficient number, since it is larger than the sum of its proper divisors (5947649).

13382181 is a wasteful number, since it uses less digits than its factorization.

13382181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486915 (or 1486912 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 13382181 is about 3658.1663439488. The cubic root of 13382181 is about 237.4154439530.

The spelling of 13382181 in words is "thirteen million, three hundred eighty-two thousand, one hundred eighty-one".