11187331 has 2 divisors, whose sum is σ = 11187332. Its totient is φ = 11187330.

The previous prime is 11187329. The next prime is 11187347. The reversal of 11187331 is 13378111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11187331 - 2¹ = 11187329 is a prime.

It is a super-2 number, since 2×11187331² = 250312749807122, which contains 22 as substring.

Together with 11187329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11187296 and 11187305.

It is not a weakly prime, because it can be changed into another prime (11182331) 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, 5593665 + 5593666.

It is an arithmetic number, because the mean of its divisors is an integer number (5593666).

Almost surely, 2^11187331 is an apocalyptic number.

11187331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11187331 is an equidigital number, since it uses as much as digits as its factorization.

11187331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 11187331 is about 3344.7467766634. The cubic root of 11187331 is about 223.6533954554.

The spelling of 11187331 in words is "eleven million, one hundred eighty-seven thousand, three hundred thirty-one".