11162381 has 2 divisors, whose sum is σ = 11162382. Its totient is φ = 11162380.

The previous prime is 11162377. The next prime is 11162441. The reversal of 11162381 is 18326111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 100 = 3341^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 11162381 - 2² = 11162377 is a prime.

It is a super-2 number, since 2×11162381² = 249197499178322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11162311) 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, 5581190 + 5581191.

It is an arithmetic number, because the mean of its divisors is an integer number (5581191).

Almost surely, 2^11162381 is an apocalyptic number.

It is an amenable number.

11162381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11162381 is an equidigital number, since it uses as much as digits as its factorization.

11162381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 11162381 is about 3341.0149655456. The cubic root of 11162381 is about 223.4870076711.

Adding to 11162381 its reverse (18326111), we get a palindrome (29488492).

The spelling of 11162381 in words is "eleven million, one hundred sixty-two thousand, three hundred eighty-one".