11730181 has 4 divisors (see below), whose sum is σ = 12134700. Its totient is φ = 11325664.

The previous prime is 11730179. The next prime is 11730209. The reversal of 11730181 is 18103711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18103711 = 83 ⋅218117.

It can be written as a sum of positive squares in 2 ways, for example, as 5022081 + 6708100 = 2241^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 11730181 - 2¹ = 11730179 is a prime.

It is a super-2 number, since 2×11730181² = 275194292585522, 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 (11730281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202216 + ... + 202273.

It is an arithmetic number, because the mean of its divisors is an integer number (3033675).

Almost surely, 2^11730181 is an apocalyptic number.

It is an amenable number.

11730181 is a deficient number, since it is larger than the sum of its proper divisors (404519).

11730181 is an equidigital number, since it uses as much as digits as its factorization.

11730181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404518.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 11730181 is about 3424.9351818684. The cubic root of 11730181 is about 227.2139043452.

Adding to 11730181 its reverse (18103711), we get a palindrome (29833892).

It can be divided in two parts, 11730 and 181, that added together give a palindrome (11911).

The spelling of 11730181 in words is "eleven million, seven hundred thirty thousand, one hundred eighty-one".