11572181 has 2 divisors, whose sum is σ = 11572182. Its totient is φ = 11572180.

The previous prime is 11572163. The next prime is 11572193. The reversal of 11572181 is 18127511.

11572181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 3960100 = 2759^2 + 1990^2 .

It is an emirp because it is prime and its reverse (18127511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11572181 - 2¹⁸ = 11310037 is a prime.

It is a super-2 number, since 2×11572181² = 267830746193522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11572181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11571181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5786090 + 5786091.

It is an arithmetic number, because the mean of its divisors is an integer number (5786091).

Almost surely, 2^11572181 is an apocalyptic number.

It is an amenable number.

11572181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11572181 is an equidigital number, since it uses as much as digits as its factorization.

11572181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 26.

The square root of 11572181 is about 3401.7908518896. The cubic root of 11572181 is about 226.1891347525.

Adding to 11572181 its reverse (18127511), we get a palindrome (29699692).

The spelling of 11572181 in words is "eleven million, five hundred seventy-two thousand, one hundred eighty-one".