11822681 has 4 divisors (see below), whose sum is σ = 12732132. Its totient is φ = 10913232.

The previous prime is 11822663. The next prime is 11822711. The reversal of 11822681 is 18622811.

11822681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18622811 = 73 ⋅255107.

It can be written as a sum of positive squares in 2 ways, for example, as 7070281 + 4752400 = 2659^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 11822681 - 2¹⁴ = 11806297 is a prime.

It is a super-2 number, since 2×11822681² = 279551572055522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11822611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454706 + ... + 454731.

It is an arithmetic number, because the mean of its divisors is an integer number (3183033).

Almost surely, 2^11822681 is an apocalyptic number.

It is an amenable number.

11822681 is a deficient number, since it is larger than the sum of its proper divisors (909451).

11822681 is an equidigital number, since it uses as much as digits as its factorization.

11822681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909450.

The product of its digits is 1536, while the sum is 29.

The square root of 11822681 is about 3438.4125697769. The cubic root of 11822681 is about 227.8095837578.

The spelling of 11822681 in words is "eleven million, eight hundred twenty-two thousand, six hundred eighty-one".