11231181 has 24 divisors (see below), whose sum is σ = 17777760. Its totient is φ = 6790176.

The previous prime is 11231159. The next prime is 11231201. The reversal of 11231181 is 18113211.

It is a happy number.

It is not a de Polignac number, because 11231181 - 2⁹ = 11230669 is a prime.

It is a super-2 number, since 2×11231181² = 252278853309522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6090 + ... + 7716.

It is an arithmetic number, because the mean of its divisors is an integer number (740740).

Almost surely, 2^11231181 is an apocalyptic number.

It is an amenable number.

11231181 is a deficient number, since it is larger than the sum of its proper divisors (6546579).

11231181 is a wasteful number, since it uses less digits than its factorization.

11231181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1702 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11231181 is about 3351.2954211767. The cubic root of 11231181 is about 223.9452260313.

Adding to 11231181 its reverse (18113211), we get a palindrome (29344392).

It can be divided in two parts, 1123 and 1181, that added together give a square (2304 = 48²).

The spelling of 11231181 in words is "eleven million, two hundred thirty-one thousand, one hundred eighty-one".