11381831 has 2 divisors, whose sum is σ = 11381832. Its totient is φ = 11381830.

The previous prime is 11381827. The next prime is 11381837. The reversal of 11381831 is 13818311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11381831 - 2² = 11381827 is a prime.

It is a super-2 number, since 2×11381831² = 259092153825122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11381831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11381837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690915 + 5690916.

It is an arithmetic number, because the mean of its divisors is an integer number (5690916).

Almost surely, 2^11381831 is an apocalyptic number.

11381831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11381831 is an equidigital number, since it uses as much as digits as its factorization.

11381831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 11381831 is about 3373.6969336323. The cubic root of 11381831 is about 224.9420822119.

The spelling of 11381831 in words is "eleven million, three hundred eighty-one thousand, eight hundred thirty-one".