11522181 has 16 divisors (see below), whose sum is σ = 16930368. Its totient is φ = 6912000.

The previous prime is 11522179. The next prime is 11522183. The reversal of 11522181 is 18122511.

11522181 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11522179) and next prime (11522183).

It is not a de Polignac number, because 11522181 - 2¹ = 11522179 is a prime.

It is a super-2 number, since 2×11522181² = 265521309993522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11522183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605 + ... + 5061.

It is an arithmetic number, because the mean of its divisors is an integer number (1058148).

Almost surely, 2^11522181 is an apocalyptic number.

11522181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11522181 is a deficient number, since it is larger than the sum of its proper divisors (5408187).

11522181 is a wasteful number, since it uses less digits than its factorization.

11522181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572.

The product of its digits is 160, while the sum is 21.

The square root of 11522181 is about 3394.4338261336. The cubic root of 11522181 is about 225.8628988069.

Adding to 11522181 its reverse (18122511), we get a palindrome (29644692).

It can be divided in two parts, 1152 and 2181, that added together give a palindrome (3333).

The spelling of 11522181 in words is "eleven million, five hundred twenty-two thousand, one hundred eighty-one".