11831081 has 2 divisors, whose sum is σ = 11831082. Its totient is φ = 11831080.

The previous prime is 11831077. The next prime is 11831089. The reversal of 11831081 is 18013811.

11831081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 1210000 = 3259^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 11831081 - 2² = 11831077 is a prime.

It is a super-2 number, since 2×11831081² = 279948955257122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11831089) 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 as a sum of consecutive naturals, namely, 5915540 + 5915541.

It is an arithmetic number, because the mean of its divisors is an integer number (5915541).

Almost surely, 2^11831081 is an apocalyptic number.

It is an amenable number.

11831081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11831081 is an equidigital number, since it uses as much as digits as its factorization.

11831081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11831081 is about 3439.6338467924. The cubic root of 11831081 is about 227.8635237927.

Adding to 11831081 its reverse (18013811), we get a palindrome (29844892).

The spelling of 11831081 in words is "eleven million, eight hundred thirty-one thousand, eighty-one".