11831481 has 8 divisors (see below), whose sum is σ = 17528160. Its totient is φ = 7887636.

The previous prime is 11831459. The next prime is 11831483. The reversal of 11831481 is 18413811.

11831481 is a `hidden beast` number, since 1 + 183 + 1 + 481 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-11831481 is a prime.

It is a super-2 number, since 2×11831481² = 279967885306722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 438203 = 11831481 / (1 + 1 + 8 + 3 + 1 + 4 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (11831483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219075 + ... + 219128.

It is an arithmetic number, because the mean of its divisors is an integer number (2191020).

Almost surely, 2^11831481 is an apocalyptic number.

It is an amenable number.

11831481 is a deficient number, since it is larger than the sum of its proper divisors (5696679).

11831481 is an equidigital number, since it uses as much as digits as its factorization.

11831481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438212 (or 438206 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 11831481 is about 3439.6919920249. The cubic root of 11831481 is about 227.8660917289.

The spelling of 11831481 in words is "eleven million, eight hundred thirty-one thousand, four hundred eighty-one".