11380181 has 2 divisors, whose sum is σ = 11380182. Its totient is φ = 11380180.

The previous prime is 11380141. The next prime is 11380207. The reversal of 11380181 is 18108311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7344100 + 4036081 = 2710^2 + 2009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11380181 is a prime.

It is a super-2 number, since 2×11380181² = 259017039185522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11380121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690090 + 5690091.

It is an arithmetic number, because the mean of its divisors is an integer number (5690091).

Almost surely, 2^11380181 is an apocalyptic number.

It is an amenable number.

11380181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11380181 is an equidigital number, since it uses as much as digits as its factorization.

11380181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11380181 is about 3373.4523859097. The cubic root of 11380181 is about 224.9312118937.

Adding to 11380181 its reverse (18108311), we get a palindrome (29488492).

The spelling of 11380181 in words is "eleven million, three hundred eighty thousand, one hundred eighty-one".