11665231 has 2 divisors, whose sum is σ = 11665232. Its totient is φ = 11665230.

The previous prime is 11665223. The next prime is 11665237. The reversal of 11665231 is 13256611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11665231 - 2³ = 11665223 is a prime.

It is a super-2 number, since 2×11665231² = 272155228566722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11665196 and 11665205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11665237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832615 + 5832616.

It is an arithmetic number, because the mean of its divisors is an integer number (5832616).

Almost surely, 2^11665231 is an apocalyptic number.

11665231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665231 is an equidigital number, since it uses as much as digits as its factorization.

11665231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 11665231 is about 3415.4400887733. The cubic root of 11665231 is about 226.7937669042.

The spelling of 11665231 in words is "eleven million, six hundred sixty-five thousand, two hundred thirty-one".