11523181 has 2 divisors, whose sum is σ = 11523182. Its totient is φ = 11523180.

The previous prime is 11523163. The next prime is 11523199. The reversal of 11523181 is 18132511.

It is a balanced prime because it is at equal distance from previous prime (11523163) and next prime (11523199).

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 434281 = 3330^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 11523181 - 2⁷ = 11523053 is a prime.

It is a super-2 number, since 2×11523181² = 265567400717522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11523581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5761590 + 5761591.

It is an arithmetic number, because the mean of its divisors is an integer number (5761591).

Almost surely, 2^11523181 is an apocalyptic number.

It is an amenable number.

11523181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11523181 is an equidigital number, since it uses as much as digits as its factorization.

11523181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 11523181 is about 3394.5811229075. The cubic root of 11523181 is about 225.8694327657.

Adding to 11523181 its reverse (18132511), we get a palindrome (29655692).

The spelling of 11523181 in words is "eleven million, five hundred twenty-three thousand, one hundred eighty-one".